BP clashes with scientists over deep sea oil pollution
Colin Powell said, the military should step in because the crisis was now “beyond the capacity” of BP to stop.
White House Tries to Regroup, Criticism Mounts Over Leak
The failure of the most recent effort, known as a top kill, which BP officials expressed great optimism about before trying it, has underlined the gaps in knowledge and science about the spill and its potential remedies.