The Department of Homeland Security said Friday that an employee who runs a racist website predicting and advocating a race war has been put on paid administrative leave. Ayo Kimathi, an acquisitions officer for Immigration and Customs Enforcement who is in charge of buying weapons and ammunition for the government, operates the website named "War on the Horizon." It includes descriptions of an "unavoidable, inevitable clash with the white race." Kimathi is black. Kimathi has been with the department since 2009. His website criticizes whites, gays, those of mixed race, and blacks who integrate with whites. The Southern Poverty Law...