The Coast Guard is defending its response to a massive oil spill on Nov. 7 in the San Francisco Bay.
The agency has come under criticism for a delay in telling local officials and the public of the seriousness of the spill.
There was a lag time of several hours after the Coast Guard learned the spill was 58,000 gallons, not 140 gallons as initially reported.
"It's an important effort. But this spill tells us that we have got to go back and rethink all of the decisions we've made about the prevention of these spills," explained Rep. George Miller, (D)-California.
Federal investigators have begun a criminal investigation into the spill.
Authorities detained the crew for questioning Nov. 11.
The National Transportation Safety Board has also started its own investigation.