Ulf Dietrich Merbold is the first West German citizen and second German native to have flown in space. He is also the first member of the European Space Agency Astronaut Corps to participate in a spaceflight mission and the first non-US citizen to reach orbit in a US spacecraft. In 1983, he and Byron Lichtenberg became the first Payload Specialists to fly on the Space Shuttle. Merbold is also the second western European in space.