Seven agile BUFFs rapidly launch, Prairie Vigilance 10-2 Published Nov. 10, 2009 Minot Air Force Base Public Affairs MINOT AIR FORCE BASE, N.D. -- B-52H Stratofortresses soared through the sky during the rapid launch portion of Prairie Vigilance 10-2 here Nov. 5. Prairie Vigilance is a combined-wing nuclear operational readiness exercise designed to demonstrate safe, secure, reliable nuclear weapons standards and procedures. A sequence of seven B-52s successfully launched confirming the Air Force's agile ability to respond when called upon.