Feds urge vigilance by Americans against lone actor attacks

The Department of Homeland Security and Federal Bureau of Investigation sent a bulletin to law enforcement agencies across the U.S. on Friday urging vigilance against lone actor attacks.U.S. officials are not aware of any credible threat. However, officials told CBS News the bulletin was issued after the Islamic State of Iraq and Syria (ISIS) made an online call for attacks against churches in the U.S. ISIS’ call -- and authorities’ bulletin urging vigilance -- followed the Monday as