Twisters leave trail of tears

See more photos from the tornado devastation on Flickr

Snow covers a tornado-damaged school bus and the ruins of the Henryville combined high school and middle school, seen in the background, in the small community of Henryville, Indiana March 5, 2012. Calm weather gave dazed residents of storm-wracked U.S. towns a respite on Sunday as they dug out from a chain of tornadoes that cut a swath of destruction from the Midwest to the Gulf of Mexico, ... more 

See more photos from the tornado devastation on Flickr

Snow covers a tornado-damaged school bus and the ruins of the Henryville combined high school and middle school, seen in the background, in the small community of Henryville, Indiana March 5, 2012. Calm weather gave dazed residents of storm-wracked U.S. towns a respite on Sunday as they dug out from a chain of tornadoes that cut a swath of destruction from the Midwest to the Gulf of Mexico, killing at least 39 people. REUTERS/John Sommers II (UNITED STATES - Tags: DISASTER ENVIRONMENT) less