FILE - A Tuesday, May 21, 2013 file photo, an aerial view shows Plaza Towers Elementary School, which was destroyed in Monday's tornado, in Moore, Okla. Unlike several others schools in the Oklahoma ... more 
FILE - A Tuesday, May 21, 2013 file photo, an aerial view shows Plaza Towers Elementary School, which was destroyed in Monday's tornado, in Moore, Okla. Unlike several others schools in the Oklahoma City area, Plaza Towers had no “safe room” in which students and teachers could huddle. The deaths of seven students at Plaza Towers highlights the patchwork of protection that exists at schools in tornado-prone parts of the central U.S. (AP Photo/Tony Gutierrez, File) less 
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Associated Press | Photo By Tony Gutierrez, File
Wed, May 22, 2013 5:31 PM EDT