Adaptive Kayaking instructor Ralph Marche explains the basics of kayaking to Retired Staff Sgt. Alfredo De Los Santos at an event held by the Wounded Warrior Project in Rockaway, Queens. De Los Santos lost his right leg in Afghanistan while on patrol when his Humvee was attacked by an RPG. Three soldiers also in the Humvee died in the attack. De Los Santos currently races handcycles as a member of the U.S. Military Paralympic Team.