Viking 2 at the Kennedy Space Centre, Cape Canaveral, Florida, 1975.

Two Viking spacecraft were launched towards Mars in 1975, each carrying a lander spacecraft and an orbiter. Viking 2 was launched on 9th September 1975 and landed in the Utopia Planitia region of Mars on 3rd September 1976, where it studied the Martian environment, soil constituents and searched for simple life forms - none were found.