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We have known for some time that a flaw in the cement used on BP's Macondo well contributed to the disastrous April 20 explosion in the Gulf of Mexico. What we did not know, until now, was that both BP and Halliburton, the company BP hired to cement the well, appear to have been aware that the mixture was prone to failure -- and went ahead anyway. This disturbing disclosure is contained in a new report from the presidential commission investigating the explosion. It is sure to cause another round of ''not me'' blame-shifting between BP and Halliburton. [ABSTRACT FROM AUTHOR]

The article reports on results of a U.S. federal investigation on the Deepwater Horizon disaster in the Gulf of Mexico in 2010, which reveals that cementing used in oil rig drilling is susceptible to frequent failures.

The article reports on the five-billion-dollar investment of cement manufacturer Dangote Cement to build cement plants on the African continent.