ABC News outfitted a diving team with special hazmat suits and sent them to the Gulf to see the damage the oil leak and subsequent cleanup are causing underwater. They found that the leaking oil is combining with the cleanup chemicals to form a toxic soup.
From ABC News:
For the first time since the BP Deepwater Horizon tragedy over a month ago, "Good Morning America" Weather Anchor Sam Champion, along with Philippe Cousteau and a team of specially-trained divers, reported from under the water in the Gulf of Mexico to see first-hand what is happening beneath the surface. Wearing special hazmat dive suits, the team is the first to dive in - and document - the oil-laden waters off of the Louisiana coastline.