A British private security firm is facing questions over its role in the attack on the US consulate in Benghazi after it emerged that it was responsible for hiring local guards to protect the diplomatic site. Blue Mountain, a Wales-based firm staffed by former special forces operatives, was hired by the US government to provide security at the consulate before it was overrun in an assault that killed the ambassador and three other Americans. The company was paid only $387,413 (£239,683) by the US State Department for the year-long contract, less than the cost of deploying a single American soldier....