Experts are using a technique known as “top kill” to plug a BP well that has been gushing between 12,000 and 19,000 barrels of oil daily into the Gulf of Mexico, according to government estimates. Late this afternoon, BP had to stall the procedure because the fluid engineers were injecting into the well was oozing into the ocean -- along with more crude oil. The oil spill is on track to be the worst in U.S. history. It will take several days to know if top kill will succeed.(Flickr/Deepwater Horizon Response.)
