Armstrong rides with Bush

Texas - Seven-time Tour de France winner Lance Armstrong has joined former President George W. Bush on the last leg of a three-day, 100km mountain bike ride with 15 American soldiers who lost limbs or suffered serious injuries in Iraq or Afghanistan.

The servicemen are part of the Wounded Warrior project, a nonprofit organisation dedicated to helping rehabilitate soldiers injured in service after the September 11, 2001, terrorist attacks.

Bush said on Wednesday that his three days on the desert trails of Big Bend National Park were "real cool, unbelievable."

Armstrong commended the soldiers for their will to recover. He joked that Bush was "stronger" the last time he rode with him in 2005 and that the former president "kind of blew a gasket" this time.