The Pentagon said it was never notified by U.S. intelligence agencies that they had intercepted emails between the alleged Fort Hood shooter and an extremist imam until after last week's bloody assaults, raising new questions about whether the government could have helped prevent the attack.A top defense official said federal investigators didn't tell the Pentagon they were looking into months of contacts between Maj. Nidal Malik Hasan and Anwar al-Awlaki. The imam knew three of the Sept. 11 hijackers and hailed Maj. Hasan as a "hero" after the shooting last week at Fort Hood that left 13 people dead. "Based...