Baghdad, Iraq (CNN)Iraqi Prime Minister Mustafa Al-Kadhimi escaped an assassination attempt on Sunday after an explosive-laden drone targeted his residence, the country's military said. Al-Kadhimi went on to Twitter moments after the attack and called for "calm and restraint from everyone.".. ..A source close to the Iraqi leader said Sunday that Al-Kadhimi was returning from overseeing security forces engaged in a stand-off with protesters at the southern gate of the Green Zone, the heavily fortified area of Baghdad where the the Prime Minister's residence and other government and diplomatic buildings are located, around the time of the drone attack. As...