These patrolling aircraft observe the movements of enemy leaders, thwart roadside bomb crews, monitor radio traffic, and perform other intelligence-gathering missions.
这些巡逻机侦察敌方首脑、布放路边炸弹人员、微型无线电通信的行踪以及执行其他收集情报的使命。
2
The additional coverage includes more armed officers and sniffer dogs patrolling subway stations as well as more frequent bag checks and increased surveillance of high-traffic areas.