 Other terms used for space travelers who are not career astronauts include NASA's Payload Specialist and the RKA's Researcher-Cosmonaut.The Soviet Interkosmos program included participants selected from Warsaw Pact members and later from allies of the USSR and non-aligned countries.Most of these people received full training for their missions and were treated as equals, but especially after the Mir program began, were generally given shorter flights than Soviet cosmonauts.