on reports of a leak, but did say bp is determined to get to the bottom of what caused the explosion. we also heard from a transocean spokesperson who tells us the blow-out preventer was tested and operating properly in the days and weeks before this explosion. nonetheless, transocean says it is doing its own internal investigation and is cooperating with all the other investigations under way. drew griffin, cnn, texas. >> bp is the largest drilling in the gulf but ten other companies are also drilling oil. would these companies be any more prepared to handle a spill? unlikely, says experts. >> it was in the last 18 months, 400 of these projects were pushed through with no environmental review at all. >> the obama administration says it will reform the permitting