Three F-16 Fighting Falcons from the 186th Fighter Interceptor Squadron, 120th Fighter Wing, Air National Guard, Great Falls, Montana, taxis on the ramp at 4 Wing Cold Lake for take off. Other F-16s on the ramp are also participating in the exercise that will test the response of the air intercept and air defense capabilities of the American and Canadian Forces, supporting the mission of NORAD (North American Air Defense command)