BMX biker John Parker and skateboarder Phil Hajal,

BMX biker John Parker and skateboarder Phil Hajal, members of the Action Sports Association, take a run in the half-pipe together during an extreme sports demonstration at Rio Rico High school in Rio Rico, Ariz., April 2, 2013. The ASA High School Tour, in partnership with the Campaign for Tobacco-Free Kids and the U.S. Marine Corps, brings the world's best action sports athletes to show students that it's cool to be tobacco-free. The ASA High School Tour features the world's top professional skateboarders, BMX riders and inline skaters performing mind-boggling aerial stunts on a state-of-the-art half-pipe in front of tens of thousands of students each year. For more photos visit Facebook.com/ArizonaMarines. (U.S. Marine Corps photo by Sgt. Tyler J. Bolken)