Two U.S. Air Force Thunderbirds make a knife-edge pass during the Arctic Thunder Open House biennial event hosted by Joint Base Elmendorf-Richardson, Alaska, July 26, 2014. The event features more than 40 Air Force, Army and civilian aerial acts, July 25-27, and has an expected crowd of more than 200,000 people. It is the largest two-day event in the state and one of the premier aerial demonstrations in the world. The 2014 Arctic Thunder Open House is a proud part of the Anchorage Centennial Celebration. (U.S. Air Force photo/Justin Connaher)