Title: The challenge of protecting mass gatherings in a post 9/11 world
Subtitle: hearing before the Committee on Homeland Security, House of Representatives, One Hundred Tenth Congress, second session, July 9, 2008.
Subjects: States, National security, Crowds, United States, Planning, Prevention, Rules and practice, Terrorism, Security measures, United States. Dept. of Homeland Security, United States. Department of Homeland Security
Places: United States