Jean-Loup Jacques Marie Chrétien is a French retired Général de Brigade in the Armée de l'Air, and a former CNES spationaut. He flew on two Franco-Soviet space missions and a NASA Space Shuttle missio

Sergei Konstantinovich Krikalev is a Russian mechanical engineer and former cosmonaut. He is a veteran of six spaceflights, including two long-duration missions to Mir, two short-duration missions abo