Fluor, the biggest US publicly traded engineering and construction company, faces a $1 billion claim by black former workers who allege they were discriminated against under apartheid. Anglo American, the world's second-biggest mining company, and diamond producer De Beers also face a lawsuit by former employees who say they were enslaved, beaten and tortured under apartheid. Lawyer Ed Fagan said a lawsuit would be filed today in California federal courts. The suit will argue that Fluor paid blacks less than whites and that the company helped repress workers during a 1987 strike in which two were killed.