Whitson and Melroy bid farewell

S120-E-008852 (4 Nov. 2007) --- Astronauts Peggy Whitson (left), Expedition 16 commander, and Pam Melroy, STS-120 commander, exchange handshakes in the Pressurized Mating Adapter (PMA-2) of the International Space Station as the STS-120 crewmembers exit the station to board Space Shuttle Discovery for their return trip home. Hatches were closed between the station and the shuttle at 2:03 p.m. (CST) on Nov. 4.