Prairie Vigilance 12-2 flies off without a hitch Published Dec. 14, 2009 Minot Air Force Base Public Affairs MINOT AIR FORCE BASE, N.D. -- The 5th Bomb Wing conducted a nuclear readiness exercise Dec. 7 to Dec. 10. Prairie Vigilance 12-2 is a combined nuclear operational readiness exercise designed to demonstrate safe, secure, reliable nuclear weapons standards and procedures.