The two U.S. Senators representing California said on Friday they will propose a federal task force to investigate the cause and response to the massive natural gas leak near Los Angeles. Democratic Sens. Barbara Boxer and Dianne Feinstein announced they will introduce an amendment to a national energy bill being debated by the Senate that would direct U.S. Energy Secretary Ernest Moniz to lead a task force that will recommend how to solve the ongoing methane leak and prevent future incidents.