FBI concerned about possible attack in US after Moscow massacre
The March 22 attack on a concert hall in a Moscow suburb killed at least 144 people, the deadliest in Russia in 20 years. A branch of Islamic State claimed …
concert hall
Putin blames Islamic extremists for deadly concert attack
By Dasha Litvinova | Associated Press Russian President Vladimir Putin said Monday that the gunmen who carried out the concert hall attack that killed over 130 people in a Moscow …