THE GULF OF MEXICO (AP) -- An operation that could finally seal the biggest offshore oil leak in U.S. history is under way.
Engineers are forcing mud down the throat of BP's blown-out well. It's known as a "static kill," but the government says the well also must be plugged by a "bottom kill" using a relief well.
A leader of the operation says the process is going well. The "static kill" started around 3 p.m. Central time Tuesday.
Heavy drilling mud is being sent down the broken wellhead to plug it up. It's to be followed by cement. Officials say it could take as long as days to accomplish.
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