Passage: In January 2006, space historian Dwayne A. Day published an article in online aerospace magazine The Space Review titled "Astronauts and Area 51: the Skylab Incident". The article was based on a memo written in 1974 to CIA director William Colby by an unknown CIA official. The memo reported that astronauts on board Skylab 4 had, as part of a larger program, inadvertently photographed a location of which the memo said:

Question: When was the aerospace magazine article published?
January 2006