National Geographic: The deadly explosion that ripped apart two buildings in New York's East Harlem on Wednesday morning brings new attention to a risk experts have been warning is especially great beneath the oldest U.S. cities: natural gas leaks.
Con Edison, the utility that services New York, said via Twitter that it was on the scene responding to a gas leak just before the explosion at about 9:40 a.m. The blast was so violent that it sent people "flying out the window," according to reporting by the New York Daily...