BP has started operation “Top Kill,” and we’ve embedded here the live videostream of their latest attempt to plug the well. The maneuver involves pumping heavy drilling mud and cement into the well. While routine on surface wells, it’s never been attempted at 5,000 ft underwater. And if it goes south and the blowout preventer cracks under the pressure, it could make matters worse. Bust out the popcorn! I just saw a robot arm!