Viking 1 landed on Mars.
The Viking missions were as complex and important as Apollo, in their understated way. Ironically, the first soft Mars landing by a sophisticated spacecraft came 7 years to the day after Neil Armstrong's "small step".
[link|http://a52.g.akamaitech.net/f/52/827/1d/www.space.com/images/ig77.09_viking.jpg|http://a52.g.akamai...9_viking.jpg]