Armstrong tweet: This Tour will be last.

Cycling champion Lance Armstrong is shown before a training ride in Austin, Texas, on Sunday, May 17, 1998. Armstrong returned from retirement in 1997 and won the Tour de France in 1999. (AP Photo/Harry Cabluck)

June 29, 2010 3:10:51 AM PDT
Lance Armstrong has posted on his Twitter page this year's Tour de France will be his last.