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This is Mission Control Houston.

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The Expedition 33 crew members
onboard the International Space

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Station have been
focused on a variety

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of scientific research this
week while also preparing

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for operations with a
number of visiting vehicles.

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On Monday, Flight Engineer Aki
Hoshide activated the Re-Entry

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Breakup Recorder
and installed it

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in the Automated Transfer
Vehicle number three

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for its planned Tuesday
undocking.

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That REBR records data during
re-entry on temperature,

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acceleration, rotational
rates and other items --

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data that will be transferred...

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transmitted to the
ground and studied

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to help design future
spacecraft that would pose less

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of a hazard during re-entry.

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He then joined Commander
Suni Williams

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for some ATV undocking training
before both of them went

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to work closing the hatches
between the ATV and the station.

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Leak checks were conducted

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through the night tonight
looking ahead toward the

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undocking on Tuesday.

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Hoshide also worked with
Commander Suni Williams

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on Monday and Thursday training
for next month's arrival

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of the Dragon spacecraft -- the
commercial cargo ship targeted

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for its first operational
flight to the station

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in early October -- launching
October 7 and planning to arrive

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at the station October 10.

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The computer-based training
of how they will use Canadarm2

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to grapple the Dragon when
it approaches the station

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and berth it to the
Harmony node just

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as was done during
the first Dragon visit

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to the station during its
demonstration flight in May.

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Tuesday's schedule
centered around preparations

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for the undocking of the ATV.

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All the crew had a shortened
day since they would be up later

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than usual to monitor
the ATV's undocking.

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Although during the day Suni
Williams set up the ultrasound

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for the Integrated
Cardiovascular experiment

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in which an echocardiogram
is conducted

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on the crew member
before and after exercise.

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Scientists try to quantify the
atrophy of the heart muscle

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that is associated with
long-duration spaceflight.

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Hoshide assisted her on that
experiment and spent part

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of the early part of that
day exchanging samples

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in the NanoStep experiment while
their crewmate Flight Engineer

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Yuri Malenchenko took care
of the routine maintenance

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in the Russian segment
of the station.

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Williams also conducted
two in-flight interviews

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with the Huffington Post and
CBS Radio before all three crew

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members got a midday break.

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Tuesday's undocking attempt
was aborted just a few minutes

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before the undocking took
place when the commands

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to open the hooks in the
ATV did not go through.

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The error in that configuration
was subsequently identified

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and resolved.

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But a second undocking effort
was postponed due to planning

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for a possible debris
avoidance maneuver.

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Ground teams in Houston had
been tracking two items -

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a piece of Russian Cosmos
satellite that was involved

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in a collision in
2009 and a piece

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of exploded Indian rocket body

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that had been on
orbit since 2001.

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Both of which were on course the
pass too close to the station,

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one on Thursday morning
and one on Friday morning.

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By midday Wednesday, Houston
flight controllers had been

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instructed to begin planning
for a debris avoidance maneuver

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which would involve firing the
thrusters on the ATV in order

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to change the station's
orbit and avoid the debris.

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But additional tracking later

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in the day gave the teams
confidence that neither

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of the objects presented
a real concern

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for a conjunction
anymore and so the plans

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for the maneuver were
canceled and replanning

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for the ATV's undocking
took precedence.

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On Thursday, Suni
Williams worked

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on human life sciences
investigations use...

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taking measurements for the
VO2Max experiment gauging an

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astronaut's maximum
oxygen uptake on orbit

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and the European Space
Agency's Thermolab investigation

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which looks at the changes

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in the body core temperature
before during and after exercise

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to measure adaptation
of the body

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to the microgravity environment.

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Yuri Malenchenko spent time

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on Thursday cleaning
the ventilation system

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in the Zvezda module.

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Aki Hoshide did maintenance
with the air sampling equipment

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in Kibo and maintenance

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on the advanced resistive
exercise device.

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On Friday, the crew
members worked together

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in a routine drill to
practice their emergency

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evacuation procedures.

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They also had time spent
packing items that are scheduled

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to return to Earth next month

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on that Dragon cargo ship
before getting another scheduled

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mid-day rest again due to the
change in schedule required

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to support the planned undocking

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of the European cargo
ship the "Edoardo Amaldi."

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After time off-duty over the
weekend and an opportunity

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to talk to their
families on the ground,

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next week the Expedition 33 crew
will tackle more routine station

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maintenance plus
additional training

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for the upcoming
robotic arm operations