Citizens Energy workers continue their investigation Monday, Nov. 12, 2012, at the site of an explosion at a house in Indianapolis. The search for what caused a massive, deadly explosio

 

              Citizens Energy workers continue their investigation Monday, Nov. 12, 2012, at the site of an explosion at a house in Indianapolis. The search for what caused a massive, deadly explosio
Citizens Energy workers continue their investigation Monday, Nov. 12, 2012, at the site of an explosion at a house in Indianapolis. The search for what caused a massive, deadly explosion that rocked an Indianapolis neighborhood turned to natural gas Monday, with officials checking gas lines and a homeowner saying a problem furnace could be to blame. (AP Photo/WTHR Chopper 13/The Indianapolis Star, Matt Kryger)