Overall, airport security stands at its highest level since the Persian Gulf War in 1991. Airlines are asking passengers to arrive as many as 4 hours before flights to check in.

• 总之，机场的保安人员处于1991年海湾战争以来的最高戒备状态。机场也要求乘客比起飞时间提前4个小时到达机场进行安检。