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Devout Sikh men wear the kirpan (a traditional small sword) as part of their religious faith. The kirpan is one of five symbols of Sikhism (the five K s described below). Many traditional Sikhs undergo the amrit ceremony, akin to baptism, following which they are meant to wear the five K s at all times. Several legal controversies have emerged in the West, especially in the USA (Lal, 1999) and Canada (Wayland, 1997), over safety issues related to the kirpan , such as students wearing it to school or passengers wearing it during flights (for an overview of the recent cases, see www.sikhs.ca/kirpan ).
Swaran P. Singh (Fri,) studied this question.