Armstrong's Tours voted second best

In a list of great individual sporting achievements, what tops Lance Armstrong's seven consecutive victories in the three-week-long Tour de France? According to Forbes.com, Roger Bannister's four-minute mile run in 1954 is the greatest individual athletic achievement of all time.

"In truth, there is no clear-cut number-one choice," conceded Bob Costas, a journalist and NBC commentator, who was one of the experts on the forbes.com panel that helped select the 20 sporting achievements that the sites editors and readers then voted on. "You could make a reasonable case for a dozen different achievements."