In this Friday, July 17, 2015 file photo, an FBI investigator investigates the scene of a shooting outside a military recruiting center in Chattanooga, Tenn. Nearly five months after the killing of five military personnel, authorities have studiously avoided calling the attack by a Kuwaiti-born gunman as an act of terror. Labeling Chattanooga a terror attack would make its victims eligible for the Purple Heart, which if awarded would entitle their survivors to additional payments and benefits. (AP Photo/John Bazemore, File)

5 months after Chattanooga, feds quiet on any terror links

It took about two days for the FBI to announce it was investigating the Dec. 2 attack that killed 14 in San Bernardino, California, as an ac…