S75-24926 (April 1975) --- Cosmonaut Aleksey A. Leonov, commander of the Soviet ASTP prime crew, practices with a training mock-up of the ASTP commemorative medal during Apollo-Soyuz Test Project activity at the Cosmonaut Training Center (Star City) near Moscow. Leonov is in the Soyuz orbital module trainer. Two medals divided into two halves each will be flown on the mission. The American ASTP crew will carry two halves aboard Apollo; and the Soviet ASTP crew will carry the other two halves aboard Soyuz. The four halves will be joined together to make two complete medals after the two spacecraft rendezvous and dock in Earth orbit. Grooved slots in the halves will allow the medals to be fitted together. One medal then will be returned to Earth by the astronauts; and the second medal will be brought back by the cosmonauts.