WASHINGTON, May 10, 2006 – More than 5,000 U.S. and Canadian servicemembers are working with authorities in five U.S. states and two Canadian provinces to test their response capabilities to crises ranging from a major hurricane to a terrorist attack to a pandemic flu outbreak. Ardent Sentry 2006, a two-week U.S. Northern Command exercise, kicked off May 8 to test military support to federal, provincial, state and local authorities while continuing to support the Defense Department's homeland defense mission, according to Air Force Lt. Col. Eric Butterbaugh, a NORTHCOM and North American Aerospace Defense Command spokesman. The Canadian part of...