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In page Terrorism:

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The connection between terrorism and tourism has been widely studied since the 1997 Luxor massacre, during which 62 people, including 58 foreign nationals, were killed by Islamist group al-Jama'a al-Islamiyya in an archaeological site in Egypt.[1][2] In the 1970s, the targets of terrorists were politicians and chiefs of police while now, international tourists and visitors are selected as the main targets of attacks.[citation needed] The attacks on the World Trade Center and the Pentagon on September 11, 2001, were the symbolic center, which marked a new epoch in the use of civil transport against the main power of the planet.[3] From this event onwards, the spaces of leisure that characterized the pride of West were conceived as dangerous and frightful.[4][5]