AdvertisementFBI Tracking 100 Suspected Extremists In MilitaryJune 25, 2012Dina Temple-RastonfacebookEmailThe FBI is investigating more than 100 suspected Muslim extremists who are part of the U.S. military community, officials tell NPR. U.S. authorities have increased scrutiny since the 2009 shooting attack at Fort Hood, Texas, that left 13 dead. Maj. Nidal Hasan, charged with the killings, is shown here in an April 2010 court hearing. (Getty Images)