Iraq has filed a lawsuit against private security firm Blackwater in a US court and will file another in Iraq, Prime Minister Nuri al-Maliki said on Monday, amid fury over an American court dropping charges against five Blackwater guards…The guards, who had been part of a convoy of armoured vehicles, had been charged with killing 14 unarmed Iraqi civilians and wounding 18 others during an unprovoked attack at a busy Baghdad roundabout using guns and grenades. Iraq says 17 people were killed.