A U.S. Air Force F-16 Fighting Falcon from 120th Fighter Squadron, Colorado Air National Guard, joins up behind a KC-135 Stratotanker from the 141st Air Refueling Wing, Fairchild Air Force Base, to refuel during North American Aerospace Defense Command’s (NORAD) arctic air defense exercise, Amalgam Dart 21-01, June 12, 2021. Exercise Amalgam Dart will run from June 10-19, 2021, with operations ranging across the Arctic from the Beaufort Sea to Thule, Greenland. Amalgam Dart 21-01 provides NORAD the opportunity to hone continental defense skills as Canadian and U.S. forces operate together in the Arctic. A bi-national Canadian and American command, NORAD employs a network of space-based, aerial and ground-based sensors, air-to-air refueling tankers, and fighter aircraft, controlled by a sophisticated command and control network to deter, deny and defeat aerospace threats that originate outside or within our borders. (U.S. Air Force photo by Airman 1st Class Kiaundra Miller)