Army National Guard Sgt. David Whaley and Pvt. Jason Carroll, from 1194th Engineer Company, prepare to extract a simulated victim from a collapsed building during exercise Ardent Sentry held at the Muscatatuck Urban Training Center in Indiana May 13, 2007. Exercise Ardent Sentry is one of the NORAD-USNORTHCOM exercises which focuses on defense support of civil authorities. Staff Sgt. Ricky A. Bloom

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Keywords: 3, army, cente, conflict, indiana, military, muscatatu, muscatatuck, soldier, soldiers, states, training, united, urban, usa, war,