As the events of September 11, 2001, in New York City and Washington, D.C., illustrated, air pirates, hostage takers, and terrorists provide police with some of the most difficult challenges in protecting the public.
Nagu näitasid 2001. aasta 11. septembri sündmused New Yorgis ja Washingtonis, teevad politseil rahva kaitsmise eriti raskeks lennukikaaperdajad, pantvangide võtjad ja terroristid.