ISS044E013678 (07/15/2015) --- On July 15, 2015 aboard the International Space Station, Expedition 44 crew memebrs Scott Kelly of NASA (left), Expedition Commander and Russian cosmonaut Gennady Padalka (middle), and Russian cosmonaut Mikhail Kornienko (right) commemorated the 40th anniversary of the joint Apollo-Soyuz mission.