(CNN) – Crews are lowering a massive concrete containment dome to the ocean floor today, trying to cover a ruptured well that's spewing thousands of gallons of oil into the gulf each day. It's one of many techniques conceived and tested at a naval base in New Jersey. Cameras have never been allowed inside the "Oil Spill Research and Training Facility," until now. Our Allan Chernoff has the CNN exclusive report.
Read more: Dome lowered at Gulf oil leak site