BP has a collection of 'bots' or ROV's, remotely operated vehicles, tethered underwater robots operating in the Gulf of Mexico near the blown out Macondo Well site, while they attempt to either plug the leak or at least find ways to recover and siphon off the leaking oil.
Sitting on top of the well pipe projecting from the seabed is the BOP, or Blow Out Preventer, the large steel 450 ton apparatus that you may have seen in various photographs and videos from BP's Live Feed as they recently cut off the top of the riser pipe that ran from the BOP to the Deepwater Horizon platform before it burned and sank.
There has been much speculation lately that the well bore is damaged below the seabed and that oil is leaking out of the well into the seabed underneath and around the BOP.
continued at Daily Kos....