His shooting attack was the first of two in 2009 at US military facilities. In the Fort Hood shooting in November, US Army psychiatrist Nidal Malik Hasan shot and killed 13 and wounded 29 other soldiers. A Senate special report chaired by the Independent Joseph Lieberman declared it "the deadliest terrorist attack within the United States since September 11, 2001". Hasan was charged with murder and was sentenced to death.