Liar or light? The first time I went to an international airport. The big tall armed police officer or guard walked around, and said 'any liar? any liar?' I thought it must be the easist way to force the law. No chasing, no gun shooting，simple. In this moment, I had an eyecontact with him. I standed up more, and tapped my chest, said "not a liar, I am an honest man." The police officer, "what?" He showed me a box with many lighters. He was there to tell people no lighter goin the airplane. Should put lighters in the box before go security check.