50 years ago today, John Glenn was boosted into space on top of a Atlas LV-3B rocket. More precisely, he sat inside Friendship 7 (Mercury-Atlas 6) on top of the Atlas. Friendship 7 was a very cramped affair in deed.
More detailed information on the mission is obviously available from the people resonsible, NASA. The National Aeronautic and Space Association has set up a special site commemorating the event.
I leave you with one of the official photographs taken in 1962 (digitalized version) courtesy of NASA: