Get outside
PETERSON AIR FORCE BASE, Colo. -- Balance beams on springs, on the Half Mile Loop Trail at Capt. David Lyon Memorial Park, Peterson Air Force Base, Colo., June 29, 2017, are designed to work out the core muscles as the beam wobbles back and forth. The park is named after Capt. David Lyon who was killed by an improvised explosive device in Kabul, Afghanistan, Dec. 27, 2013. (U.S. Air Force Photo by Steve Kotecki)