Flight engineers Koichi Wakata and Michael Barratt worked to complete the maintenance of the station's treadmill vibration isolation system Friday. The astronauts spent several days working on the exercise unit to improve its performance after years of on-orbit use.

A second treadmill will be delivered in the summer aboard space shuttle Discovery during the STS-128 mission. The new treadmill, named Combined Operational Load Bearing External Resistance Treadmill, or COLBERT, was named after comedian Stephen Colbert.

Commander Gennady Padalka and Barratt are checking the Russian Orlan spacesuits in advance of two spacewalks planned for June 5 and June 10. The spacewalkers will relocate docking hardware inside and outside the Pirs docking compartment. This sets the stage for the arrival in November of Russia's new Mini-Research Module-2 (MRM-2). The MRM-2 will provide improved access to the Zvezda service module's zenith docking port for Soyuz and Progress space vehicles.

Mike Barratt, Expedition 19 flight engineer aboard the International Space Station, set up and activated a new camera Monday that will provide timely images that farmers, ranchers and foresters can use to better manage their crops and livestock.

The Agricultural Camera (AgCam) will take visible light and infrared images of the Earth below, principally of growing crops, rangeland, grasslands, forests, and wetlands in the northern Great Plains and Rocky Mountain regions of the United States.

The images will be delivered - in just one to two days -- to requesting farmers, ranchers, foresters, natural resource managers and tribal officials to help improve their environmental stewardship of the land for which they are responsible. Images will also be shared with educators for classroom use. The Agricultural Camera was built and will be operated primarily by students and faculty at the University of North Dakota, Grand Forks, ND.

The International Space Station's Expedition 19 crew focused Tuesday on setting up spacewalk and experiment hardware as the clock counted down to NASA's announcement of a name for the newest station module.

In the Pirs Docking Compartment, Commander Gennady Padalka replaced umbilicals for the newest version of the Russian Orlan spacesuit. Padalka also inventoried food utensils in the Russian segment of the station.

Flight Engineer Mike Barratt spent much of his day working with AgCam, the Agriculture Camera experiment sponsored by the University of North Dakota. Positioned in the window of the station's Destiny laboratory, AgCam will capture images of vegetated areas on the Earth, principally of growing crops, rangeland, grasslands, forests and wetlands in the northern Great Plains and Rocky Mountain regions of the United States. Images will be delivered to farmers, ranchers, foresters, natural resource managers and tribal officials to help improve their stewardship of the land.

Commander Mike Fincke and Flight Engineer Yury Lonchakov of the 18th International Space Station crew landed in Kazakhstan at 3:16 a.m. EDT Wednesday after about six months in space.

All three people aboard the Soyuz TMA-13 spacecraft were reported to be in good condition after their re-entry and landing.

A Russian recovery team and NASA personnel reached the landing site by helicopter shortly after the Soyuz touched down. They helped the crew members into reclining chairs for medical tests and set up a medical tent nearby.

With Fincke and Lonchakov was spaceflight participant Charles Simonyi. He launched to the station March 26 with the Expedition 19 crew, Commander Gennady Padalka and Flight Engineer Michael Barratt, under contract with the Russian Federal Space Agency.

The two crews aboard the International Space Station are set to go their separate ways, as Expedition 18 prepares to return to Earth early Wednesday.

After a farewell ceremony with the Expedition 19 crew, the departing Expedition 18 crew members, Commander Mike Fincke and Flight Engineer Yury Lonchakov, will board their Soyuz TMA-13 spacecraft and close the hatches around 8:45 p.m. EDT tonight.

The Soyuz is scheduled to undock from the station at 11:52 p.m. for a landing in Kazakhstan at 3:16 a.m. Wednesday. Russian recovery teams and NASA personnel are prepared to reach the crew by helicopter shortly afterwards, even in the event of ballistic landing.

Expedition 18 Commander Mike Fincke and Flight Engineer Yury Lonchakov continued preparations Monday for their impending departure from the International Space Station. Among those activities were physical exercise and the transfer to their Soyuz TMA-13 spacecraft of experiments and other items slated for return to Earth.

Fincke and Lonchakov are targeted to return to Earth on April 8. Joining them aboard their Soyuz spacecraft will be Charles Simonyi, a spaceflight participant who arrived at the station with Expedition 19 for a two-week stay. Staying aboard the station are Expedition 19 Commander Gennady Padalka and flight engineers Koichi Wakata and Michael Barratt.

With the traditional Change-of-Command ceremony on Thursday, Commander Mike Fincke officially handed over control of the International Space Station to Expedition 19 Commander Gennady Padalka.

Fincke and Flight Engineer Yury Lonchakov are targeted to return to Earth on April 7. Joining them aboard their Soyuz TMA-13 spacecraft will be Charles Simonyi, a spaceflight participant who arrived at the station with Expedition 19 for a two-week stay.

Staying aboard the station with Padalka are flight engineers Koichi Wakata and Michael Barratt. Wakata joined Expedition 18 after space shuttle Discovery swapped him for Flight Engineer Sandra Magnus. Barratt launched to the station on a Soyuz TMA-14 with Padalka and Simonyi the same day Discovery undocked from the orbiting laboratory. Expedition 19 docked at the station the same day Discovery landed in Florida.

Tuesday marked a busy day aboard the International Space Station as the departing crew showed the ropes to the orbital outpost's newest long-duration residents and both crews worked together to study science and conduct housekeeping.

The newly-arrived Expedition 19 crew members, Commander Gennady Padalka and Flight Engineer Mike Barratt, spent much of the workday shadowing their counterparts on the outgoing Expedition 18 crew, Commander Mike Fincke and Flight Engineer Yury Lonchakov.

Fincke and Lonchakov will return to Earth aboard their Soyuz TMA-13 spacecraft on April 7. Riding with them will be Charles Simonyi, who came to the station with the Expedition 19 crew on March 28 as a spaceflight participant.

The six inhabitants of the orbiting International Space Station had a busy day of science and maintenance Monday, as they began a full week of activities together.

Expedition 18 Commander Mike Fincke and Expedition 19 Flight Engineer Michael Barratt inspected hatch seals throughout the U.S. segment of the station.

Expedition 18 Flight Engineer Yury Lonchakov and Expedition 19 Commander Gennady Padalka checked out the radio link between the Zvezda module and the two Soyuz spacecraft currently docked to the orbital complex. Padalka also worked with the BIOEMULSION experiment, a Russian effort to develop technology to produce microorganisms safely for bacterial, fermental and medical preparations.

Commander Gennady Padalka and Flight Engineer Michael Barratt of the 19th International Space Station crew launched in their Soyuz TMA-14 from the Baikonur Cosmodrome in Kazakhstan at 7:49 a.m. EDT Thursday to begin a six-month stay in space.

Less than 10 minutes after launch their spacecraft reached orbit. Its antennas and solar arrays were deployed shortly afterward.

With Padalka and Barratt is second-time spaceflight participant Charles Simonyi, flying under contract with the Russian Federal Space Agency. Simonyi previously flew to the station in April 2007 as a spaceflight participant with the Expedition 15 crew.