Halliburton Could Shoulder Some Blame For BP Oil Spill

Halliburton is admitting it skipped doing a critical test on the final formulation of cement used to seal the BP oil well that leaked millions of gallons of oil into the gulf.  Halliburton company was BP's cementing contractor, and said yesterday that at the last minute, BP increased the amount of a critical ingredient in the cement mix.  While an earlier test showed the cement was stable, the company never performed a stability test on the new blend.  The cement's failure to prevent oil and gas from entering the well has been identified as one of the causes of the April 20th disaster.