1st of 2 adventures in the Viz Signature series of Golgo 13 #4, Aug. 2006. Originally was story #137
"1975: The Apollo-Soyuz mission is about to launch--the first-ever space rendezvous between the U.S. and U.S.S.R. But this gesture of peace could trigger a war instead, unless Golgo turns astronaut...to carry out a sniping job 140 miles up"