President to visit Gulf again
President Obama will return to Gulf Coast on Friday for new inspection of oil spill damage.
Meanwhile, the Coast Guard says BP crews successfully cut off the pipe.
However, the pipe cut is irregular. It will not be more challenging to get cap on in effort to contain Gulf oil.
Coast Guard says they are not sure exactly why the diamond-tipped saw failed in effort to contain Gulf oil.
If it's successful, the effort would reduce the spill, but wouldn't end it.