Xavier Delgado, front, and his sister, Haley Delgado, rear, arrive for the start of school at the temporary site for Plaza Towers Elementary school in Moore, Okla., Tuesday, May 20, 2014, one year ... more 
Xavier Delgado, front, and his sister, Haley Delgado, rear, arrive for the start of school at the temporary site for Plaza Towers Elementary school in Moore, Okla., Tuesday, May 20, 2014, one year after the May 20, 2013 tornado destroyed Plaza Towers school, leaving Xavier Delgado and other third graders trapped in the rubble. (AP Photo/Sue Ogrocki) less 
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Associated Press | Photo By Sue Ogrocki
Tue, May 20, 2014 11:27 AM EDT