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This is Mission Control Houston.

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Half of the members of
the Expedition 33 crew are

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in their final week on orbit.

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They've got a lot of their
time this week devoted

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to preparations for their
departure and landing.

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Station Commander Suni Williams,

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Flight Engineers
Yuri Malenchenko

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and Aki Hoshide will
depart for Earth on Sunday.

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Yesterday Williams
and Malenchenko

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who is the Soyuz commander
conducted a Soyuz descent drill

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while Hoshide performed
ultrasound scans of his leg

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and thigh for the
investigation known as Sprint,

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which is looking into
the value of high density

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and low-volume exercise as a way
to minimize an astronaut's bone

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or muscle loss as well

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as improve their cardiovascular
function while they're

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in the microgravity environment.

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All three of them have time

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on their schedule each day this
week for departure preparation

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to pack up their belongings
and get gear stowed

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in their Soyuz spacecraft
for the ride to Earth.

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After some of that prep time
this morning Williams performed

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maintenance and maintenance
inspection

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on the TVIS treadmill while
flight engineer Oleg Novitskiy

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exercised on that
apparatus at the same time

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as Evgeny Tarelkin used
the Russian ergometer,

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all of which are more exercise
tools that the crew members use

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to keep fit while
they're in space.

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Kevin Ford started off the day
wrapping up the stowage of tools

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that were used by
Williams and Hoshide.

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during their spacewalk earlier
this month while Hoshide

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prepared hardware for
the upcoming installation

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of new computer network wireless
access point in the station.

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He also did his final data takes

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with the Integrated
Cardiovascular experiment.

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That experiment is trying
to quantify cardiac atrophy

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that is sufered by crew members
during long-duration flight.

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Ford spent his afternoon
doing maintenance on a valve

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in the water recovery system.

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For Malenchenko much of
the afternoon was spent

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on Russian systems
maintenance while Novitskiy

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and Tarelkin worked
on Russian experiments

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in technology studies
and cosmic biotechnology.

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The three crew members
coming home,

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the crew of the 31 Soyuz
spacecraft, returning more

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of their attention to packing up
and getting ready to come home.

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The change of command ceremony
for the crew is scheduled

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for this Saturday afternoon
and Expedition 34 will begin

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on Sunday night when
Williams, Malenchenko