The Army psychiatrist suspected of killing 12 soldiers and a civilian here last week was in e-mail contact earlier this year with a radical cleric in Yemen who has decried what he calls America's war against Islam, a federal law enforcement official said Monday. U.S. intelligence agencies intercepted between 10 and 20 e-mails from Maj. Nidal M. Hasan to Anwar al-Aulaqi, a U.S. citizen who once was a spiritual leader at the suburban Virginia mosque where Hasan had worshipped, Rep. Peter Hoekstra (Mich.), the ranking Republican on the House Intelligence Committee, said later Monday. Aulaqi responded to Hasan at least...