to Saudi Arabia as a tech support for the radar system. To protect from possible chemical weapon attack, everyone got the gear set. Once the alarm was one, everyone had to put on the gear and run for cover. At first everyone followed the rules, but after a couple of day, people were dog tire, especially during the night when the alarm sounded. Most of the people instead of putting on the gear, kept sleeping.
Human is human, regardless what the rules said, when there are too many crying-wolf things, people just ignore it. There are quit some people die because they are too use to the "war," and don't follow the rules. It is like HunHun pointed out before regarding wearing the safety belt.