The U.S. Air Force Thunderbirds perform the Arrowhead

The U.S. Air Force Thunderbirds perform the Arrowhead Bottom-Up Pass during the Arctic Thunder Open House biennial event hosted by Joint Base Elmendorf-Richardson, Alaska, July 26, 2014. Arctic Thunder is a biennial event hosted by JBER. Featuring more than 40 Air Force, Army and civilian aerial acts and 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 by Master Sgt. John R. Nimmo, Sr./Released)