Does an airline pilot really need to surrender his tweezers at airport security when he''s about to board an aircraft equipped with an axe on the back of the cockpit door Can a mobile phone really cause a major explosion at a gas station And is there really a good reason why you should be be prevented from swimming in a lake more than a foot deep These rules exist, and they exist in the name of our own protection. But in this engrossing dissection of global health, safety and security regulations, authors Tracey Brown and Michael Hanlon dig a little deeper to discover the real reasons behind many of the instructions we obey without questioning their creators'' motives. Their conclusions range from the startling to the staggering, and in presenting them the authors seek to empower readers to question the people and organisations who come up with them in the first place.