Image above: Front row, Commander Mark Polansky (right) and Pilot Doug Hurley. Back row (left to right), astronauts Dave Wolf, Christopher Cassidy, Canadian Space Agency's Julie Payette, Tom Marshburn and Tim Kopra, all mission specialists. Kopra is scheduled to join Expedition 20 as flight engineer after launching to the International Space Station with the STS-127 crew. Image credit: NASA