What is Booby trap?
[[File:Cu Chi Tunnel 1.JPG|thumb|A booby trap with [[punji stick]]s.]] [[File:Yugo M52.JPG |thumb|right|250px|{{Center|A [[hand grenade]] used as a booby trap, set to go off with a [[tripwire]]}}]] A '''booby trap''' is a hidden [[device]] or [[wikt:setup|setup]] that is intended to kill, harm or [[surprise (emotion)|surprise]] a person. It is usually [[trigger]]ed by the actions of the [[victim]] who did not know the booby trap was there.<ref>{{cite web |url=http://joellambert.com/123/history-booby-traps/ |title=The History of Booby Traps |author=Andy Wood |date=21 August 2014 |publisher=JoelLambert.com |access-date=3 September 2016}}</ref> During the [[Vietnam War]] nearly 70% of [[United States|American]] [[Casualty (person)|casualties]] were due to booby traps.<ref>James Stuart Olson, ''Historical Dictionary of the 1970s'' (Westport, CT: Greenwood Press, 1999), p. 56</ref> In war, booby traps are a form of [[psychological warfare]].<ref name=Ledgard216>Jared Ledgard 2007. ''A Soldiers Handbook, Volume 1: Explosives Operations''. Headquarters, Department of the Army, USA, p. 216</ref> They are [[wikt:design|design]]ed to make [[soldiers]] slow down and be very [[wikt:cautious|cautious]].<ref name=Ledgard216/> As the word ''trap'' implies, they sometimes have some form of [[bait]] to [[wikt:attract|attract]] the victim. At other times, the trap is set to act upon [[wikt:trespass|trespass]]ers that come into [[wikt:personal|personal]] or [[wikt:restrict|restrict]]ed areas. The device can be triggered when the victim performs some type of everyday action. For [[example]] opening a door, picking something up or switching something on. They can also be triggered by [[vehicle]]s driving along a [[road]] such as an [[improvised explosive device]]s (IED's). Often booby traps are placed in a [[choke point]] (such as a [[path]]), where people or vehicles would normally move through. [[wikt:lethal|Lethal]] booby traps are often used in [[warfare]], particularly [[guerrilla warfare]]. Traps designed to cause [[injury]