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it has been quite a busy week on board

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the international space station this

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weekend will be busy as well for the

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crew of expedition 36 chris cassidy luca

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parmitano and karen nyberg half of

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expedition 36 will be working on

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saturday to take a look at this faulty

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spacesuit that luca parmitano had worn

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back on september excuse me on july 16th

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as you can see luca they're making a

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face as the crew checked out

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this spacesuit earlier this week they

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basically turned it back on

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and recreated the water leak which you

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see some of the droplets they're

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gathering in the helmet but what they're

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going to be doing on saturday is

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replacing a water relief valve

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as well as a gas trap and in between

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those two steps they will recreate what

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they did this week which is basically

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just turn the suit back on and check it

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out to see how the work has progressed

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the goal of this is to find the root

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cause

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for this spacesuit water leak that

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happened to luca while he and chris were

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outside and then the ground teams here

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in houston will be watching along this

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weekend and we'll have a full report for

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you on tuesday morning of how all of

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that work went

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there's also reboost this weekend coming

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up for the international space station

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the atv4 that's at the back end of the

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russian segment we'll fire its thrusters

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this will be setting up for chris

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cassidy and alexander misurkin and pablo

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vinogradov's departure and landing

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coming up on september the 10th

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but that reboost will take place for

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about three minutes and 25 seconds on

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another cargo vehicle the htv that is

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the japanese cargo craft onboard the

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international space station its

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operations also complete there you see

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it on the bottom side of the u.s segment

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the crew worked very uh diligently after

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htv arrived at the space station to

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unload all the cargo that was on the

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inside there's also some external cargo

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that was released

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and

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the external pallet that was in the

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middle of htv was put back in earlier

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today the release of the actual entire

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htv-4 is coming up at 11 a.m central

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time on wednesday september 4th we'll

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have live coverage of that here on nasa

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television as htv's mission comes to a

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close

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checks also taking place on friday with

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chris cassidy paul vinogradov and

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alexander misurkin checking out their

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so-called suits these are the suits they

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wore during launch and will wear during

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landing

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and their departure preparations are

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continuing onboard the space station as

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these three crew members get ready to

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come home they've been packing up all of

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their what amounts to their luggage that

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will come home aboard the soyuz coming

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up on september the 10th there you see

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all of our landing coverage we'll have

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hatch closure coverage beginning at 3 pm

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central time undocking coverage

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beginning at 6 15 pm central time and

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landing coverage coming up at 8 45 pm

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central time all of this on september

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the crew also getting ready for the

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arrival of the orbital sciences cygnus

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vehicle that launch scheduled for

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september the 17th from the wallops

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flight facility up in virginia if all

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goes according to plan orbital should

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arrive up at the station on september

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the 22nd

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for a rendezvous and docking as this

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orbital

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cygnus vehicle performs a test

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uh demonstration mission to check out

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its systems and if all goes well orbital

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should be flying some routine cargo

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flights just like spacex technologies

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did beginning last year we'll have a

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briefing coming up on wednesday

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september the 4th at 3 p.m central time

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4 pm eastern time to take a look at his

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entire mission

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and also the conclusion of nasa's cots

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program conscious what both spacex and

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orbital sciences have participated in to

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build these two cargo vehicles and that

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briefing will be mike safranini the head

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of the space station program alan

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lindemoyer the head of the nasa cots

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program as well as frank culbertson

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former astronaut who is now executive

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vice president of orbital sciences

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as well as courtney mcmillan who will be

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the nasa lead flight director for that

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mission again that will take place on

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wednesday at 3 pm central time here on

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nasa television

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this week has also had a ton of science

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going on onboard the space station karen

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nyberg worked with the spheres rings

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experiment if you've watched nasa tv and

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seen the spheres experiment you'll

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notice this looks a little bit different

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this experiment which is out of the

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university of maryland and darpa takes a

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look at uh

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formation flying of many satellites and

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also some power transfer the thought is

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that these two satellites could transfer

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power between each other

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from very small distances without

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actually touching

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so karen nyberg and luca parmitano

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worked on that this week parmitano also

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worked on something called in space 3.

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this takes a look at what are known as

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colloids

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these are small particles that reside

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inside liquids

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and the important thing about running

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these experiments up in space is that

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the sediment doesn't fall out like it

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would here on earth so you can imagine

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something that's got a bunch of

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particles inside a liquid those things

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would settle at the bottom because of

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gravity so for scientists to study them

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and their natural state they fly them up

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in space where there is no gravity uh

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now what these colloids can do

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is actually change the property of the

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liquid whenever a magnetic field is

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applied to it so that liquid all of a

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sudden becomes a solid this has direct

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impacts to life here on earth because it

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could lead to better braking systems and

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also better buildings and bridges

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because you could use these things to

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help

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buildings and bridges weather an

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earthquake so that is what that

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experiment means for life here on earth

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and also life in space

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luca parmitano also working on some bio

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lab troubleshooting biolab is

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a biological rack that is inside the

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columbus laboratory one of the

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microscopes inside that rack was having

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some issues so he performed some work on

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that to get that rack up and running

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again chris cassidy worked this week

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with robonaut that is the robot that's

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on board the space station they

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performed some checkout maneuvers of

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that

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chris cassidy also put on some virtual

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reality gear to run robonaut through

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them paces himself

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but these checkouts of this big robot on

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board the space station continue

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puffle vinogradov and the rest of the

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russian crew also worked on the lower

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body negative pressure

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experiment what this does is have the

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crew put on a pair of trousers that sort

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of pulls

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the

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that phenomenon

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and finally chris cassidy and karen

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nyberg

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working on some eye exams this week this

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is part of the ocular health experiment

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to take a look at some phenomena that's

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been noticed recently

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so that the criminal's eyes tend to

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change while they're up in space

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so to determine exactly what causes that

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and in order to predict it

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they're being put through the paces in a

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number of different experiments to take

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a look at that using an ultrasound to

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examine their eyes there you see the

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ultrasound as karen nyberg worked on

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that today

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and that activity will continue into

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next week

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we will be off on monday

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due to the federal labor day holiday but

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we will be back on tuesday morning at 10

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a.m central time 11 a.m eastern time

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we'll have an update for you on this

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weekend's activities to repair that

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spacesuit to see where the crew gets and

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of course we'll have live coverage

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beginning on wednesday of the nasa

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orbital

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sciences mission overview briefing that

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will occur on wednesday at 3 pm central

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time here on nasa television we will see