Government's point man on oil spill says work is not done on plugging up leak

The government's point man on the oil spill response says engineers will still try to firm up the now-plugged Gulf leak through a relief well.

Retired Coast Guard Adm. Thad Allen told WWL-TV in New Orleans on Wednesday that pumping mud down the throat of the blown-out well quelled the immediate threat.

But he told the station that engineers will still pump mud and cement later this month through an 18,000-foot relief well to permanently plug the underground reservoir that's fed the gusher.

Allen says "we've pretty much made this well not a threat but we need to finish this from the bottom."

BP bottled up the leak on July 15 with a massive cap after it had spewed millions of gallons of oil into the sea, but that cap was always considered a temporary solution.