His maintenance-free bike uses a "secret" mix of organic materialsto make it waterproof and fireproof, and is then lacquered to give it a friendlier appearance.
As part of the investigation, the letter said, Chevron conducted independent tests of similar cement slurry materials supplied by Halliburton and found the mixto be unstable.
Cemex said the lower forecast included the impact of acquiring building materials company Rinker Group, as well as the sale of some U.S. assets to its joint venture Ready Mix USA, as well as the confiscation of its Venezuelan assets as of Aug. 1.