Eyes in the sky: Heat-seeking drones used after tornado

After a tornado ravaged a corner of Alabama this week, rescue crews didn’t have to stumble through every destroyed building in their search for victims. Instead, they used heat-seeking drones to let them know whether there was anyone beneath the ruins.
In so doing, they joined the increasing ranks of public safety agencies across the U.S. and around the world that have employed unmanned thermal-imaging aircraft during critical situations, including manhunts, wildfires and other natural dis