What sport did Mark Spitz win 7 gold medals for in 1972?

By asking the question on WikiAnswers. And the answer is yes, Mark Spitz won seven gold medals at the 1972 Summer Games in Munich in the following events:

1) Men's 100 meter Freestyle

2) Men's 200 meter Freestyle

3) Men's 4x100 meter Freestyle Relay

4) Men's 4x200 meter Freestyle Relay

5) Men's 100 meter Butterfly

6) Men's 200 meter Butterfly

7) Men's 4x100 meter Medley Relay