When investigators try to determine exactly what transpired prior to any accident, a portion of their research boils down to two key questions: "What did you know, and when did you know it?"
Today, these two questions figure prominently in the ongoing investigation on the Deepwater Horizon tragedy and the cement used in the well. A letter from Fred H. Barlit Jr., the lead investigator for the presidential commission examining the Gulf blowout, reportedly casts doubt on the efficacy of the cement as well as the communications between BP and Halliburton before the cement was used in the well.
The presidential commission is continuing its work and will produce a report on its findings. At this point, it's much too early to speculate on a cause, or perhaps the causes, of the accident. What is... more »