Oleg Ostapenko, General Director of the Russian Federal Space Agency, Roscosmos, left, and William Gerstenmaier, NASA Associate Administrator for Human Exploration and Operations, right, shake hands following a joint statement after the docking of the Soyuz TMA-13M spacecraft with the International Space Station on Thursday, May 29, 2014 at the Baikonur Hotel in Baikonur, Kazakhstan. Photo Credit: (NASA/Joel Kowsky)