Watch where you're going, WALL-E

NEW ORLEANS -- The Coast Guard says BP has been forced to remove a cap that was containing some of the oil gushing into the Gulf of Mexico.

Coast Guard Adm. Thad Allen says an underwater robot bumped into the venting system. That sent gas rising through vent that carries warm water down to prevent ice-like crystals from forming in the cap.

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Also weren't they supposed to have this thing down to "a trickle" by now?