In Massachusetts, dozens of homes exploded Thursday in Lawrence, Andover and North Andover, killing a teenager and seriously injuring at least 10 more. The fiery explosions forced residents of the three towns north of Boston to flee for their lives. The Andover fire chief said the scene “looked like Armageddon.” Officials say it’s not exactly clear what caused the explosions, but that it could have been caused by an overpressured gas line. Columbia Gas was upgrading the gas lines in the three towns when the dozens of homes suddenly went up in flames.