BP uses "Top Kill" method to try to stop oil leak in the Gulf of Mexico

A frame grab of the live video stream of operations to stop the Deepwater Horizon oil spill is seen on May 28, 2010. BP has executed its "Top Kill" process, which places heavy kill mud into the oil well in order to reduce pressure and the flow of oil from the well, but may not know if the procedure successfully stopped the leak for several days. UPI/BP