HOUMA, La. -- Protective boom lines the Louisiana coast, May 1, 2010, after the explosion of the mobile off-shore drilling unit, Deepwater Horizon, triggered a massive oil discharge in the Gulf of Mexico. More than 217,000 feet of boom has been assigned to contain the spill, with an additional 305,760 feet available. (USCG) 10Spill0501-G-7944L-001
