An astonishing revelation appeared on a Web site about U.S. nuclear testing. It was a document apparently saying the U.S. conducted nuclear tests in Sudan in the 1960s. The House Armed Services Committee discussed the tests. The Sudanese government investigated and demanded explanation. The U.S. blamed it on a typo. The testing was not in Sudan, S-U-D-A-N, but Sedan — S-E-D-A-N, Nevada.