It looks like the explosion and subsequent oil spill that is threatening Louisiana and other Gulf coast coastal regions may have been caused by a failure to properly seal the pipes with cement, a procedure that was performed by Halliburton:

The scrutiny on cementing will focus attention on Halliburton Co., the oilfield-services firm that was handling the cementing process on the rig, which burned and sank last week. The disaster, which killed 11, has left a gusher of oil streaming into the Gulf from a mile under the surface.

Halliburton is the Vampire Squid of the oil services industry.