@realDonaldTrump Mr. President, A retired Security Electronics Professional. The Wall should be smart. A Wall in places required. Drones, Remote.vehicles with surveillance. Thermal imaging, night vision. CCTV, motion/vibration sensors. We would be the envy of the World.
@realDonaldTrump 总统先生，退休的安全电子专业人士。墙应该很聪明。在需要的地方有一堵墙。无人机，远程监控车辆。热成像，夜视。闭路电视、运动/振动传感器。我们将成为世界羡慕的对象。