He too participated in the afghan war and was a friend of Bin laden since the late eighties. He was the emissary of bin laden in Philippines and trained the Muslim fundamentalists there. He made his way into the U.S. without a visa and continued his stay there by seeking political asylum. He was a skilled expert in making chemical bombs. In 1995, Yousef was arrested by Pakistani authorities and in the next year he was sentenced to 240 years of imprisonment in the U.S. For his role in the WTO bombing. Rex a. Hudson]

Conclusion

Terrorism has expanded into every nook and corner of the world today. A terrorist today, does not appear with a distinctive personality but rather blends with the society leaving security experts with little clue. While organized crimes are mostly economically motivated, terrorism is on an entirely different footing. Religious and cultural fanatism are the main motivational factors for terrorist outfits. [Frank Bovenkerk] Terror networks are in operation with the groups globalized and operating from diverse bases. Because of this, it is not possible for law enforcement officers to operate with existing tools for local crimes. Terrorism management wings need international cooperation...

Only if there is effective information sharing between the different nations is it possible to avert terrorist attacks before they happen. However, such information sharing is precisely the problem with countries or insurgent zones where ideological differences and religious fanatism rule supreme. It is important to assess the underlying socio economic situation in a region as an important contributing factor to terror. Only when such a grass root approach is taken would it be possible to anticipate and eliminate terror before it creates havoc.
Bibliography

Rex a. Hudson, "The sociology and psychology of terrorism: Who Becomes a terrorist and why?," Sept 1999, Library of Congress, Accessed 19th November 2007, available at http://www.loc.gov/rr/frd/pdf-files/Soc_Psych_of_Terrorism.pdf

BBC, "Profile: Mullah Mohammed Omar," Accessed 19th November 2007, available at http://news.bbc.co.uk/2/hi/south_asia/1550419.stm

Frank Bovenkerk, "Terrorism and Organized Crime," Accessed 19th November 2007, available at http://igitur-archive.library.uu.nl/law/2006-0803-203003/bovenkerk_05_terrorism_and_organized.doc