FILE - This March 3, 2012 file photo shows an American flag flying over the damaged gym at Henryville High School in Henryville, Ind.. Unlike snowstorms or hurricanes, which come with ample warning, ... more 
FILE - This March 3, 2012 file photo shows an American flag flying over the damaged gym at Henryville High School in Henryville, Ind.. Unlike snowstorms or hurricanes, which come with ample warning, the sudden nature of tornadoes presents unique challenges for school officials deciding whether to hold students in place or send them home. The choice, they say, boils down to evacuating well ahead of a storm or sheltering students inside until the storm passes. Neither is guaranteed to save lives. (AP Photo/Michael Conroy) less 
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Associated Press | Photo By Michael Conroy
Tue, Mar 6, 2012 5:37 PM EST