X Games Medalist Caleb Moore

X Games Medalist Caleb Moore

AAron Ontiveroz/The Denver Post via Getty Images

Caleb Moore poses for a portrait during the Winter X Games in Aspen, Colorado. Moore, a four-time X Games medalist, was critically injured Jan. 24 at the games in Aspen, when he was struck by his 450-pound machine while attempting a backflip in the finals of the snowmobile freestyle competition.