Russia Vows 'Merciless Destruction' Of Moscow Mall Attackers, Planners; 'If Ukraine...' | Watch

Russia is in mourning and the country has vowed to avenge the attack on Moscow mall that killed dozens of people. The assault claimed by Islamic State has shaken Moscow with President Vladimir Putin's close aide and deputy chairman of Russian Security Council Dmitry Medvedev calling for "merciless destruction" of the perpetrators. Watch the video for more details.