A utilities worker checks for gas leaks near the area of a gas explosion at Nyack College Monday, June 4, 2013, in Nyack, N. Y. Natural gas had risen to “explosive” levels in the manholes at the ... more 
A utilities worker checks for gas leaks near the area of a gas explosion at Nyack College Monday, June 4, 2013, in Nyack, N. Y. Natural gas had risen to “explosive” levels in the manholes at the college where a blast rocked a building Tuesday, injuring seven people, officials said. (AP Photo/Bill Kostroun) less 
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Associated Press | Photo By Bill Kostroun
Tue, Jun 4, 2013 5:04 PM EDT