VIGILANT GUARD Virginia National Guard soldiers and airmen assigned to the Chemical, Biological, Radiological, Nuclear High Yield Explosive Response Force Package participate in exercise Vigilant Guard on Fort Indiantown Gap, Pa., May 13, 2014. Vigilant Guard is hosted quarterly by U. S. Northern Command. The multi-agency emergency preparedness exercise is designed to evaluate and enhance the integration of local, state and federal responders under one command structure. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 763620-K-UUF41-655.jpg Photo Gallery