Indiana blast investigation focuses on natural gas - Article Photos 17/24

Demolished vehicles sit in a destroyed attached garage at a home on Fieldfare Way in the Richmond Hills subdivision in Indianapolis, Monday Nov. 12, 2012. An explosion, originating on Fieldfare Way, destroyed or damaged as many as 80 structures in the subdivision late Saturday night Nov. 10, 2012. Investigators working to determine the cause of a deadly explosion that rocked an Indianapolis subdivision are looking at gas meters and pipelines as possible culprits, but a homeowners’ suggestion that his faulty furnace could be to blame is drawing skepticism from at least one expert. (AP Photo/The Indianapolis Star, Joe Vitti)