JSC2010-E-040842 (March 2010) --- Computer-generated artist?s rendering of the International Space Station as of March 18, 2010. Soyuz 20 (TMA-16) undocks from the Poisk Mini-Research Module 2 (MRM2), returning NASA astronaut Jeffrey Williams, Expedition 22 commander; and Russian cosmonaut Maxim Suraev, Soyuz commander and Expedition 22 flight engineer, to Earth. Soyuz 21 (TMA-17) is linked to the Zarya nadir port. Progress 35 resupply vehicle remains docked to the Pirs Docking Compartment and Progress 36 is linked to the Zvezda Service Module?s aft port.