"United States" . . . . . . . "The state of northern border preparedness : a review of federal, state, and local coordination : field hearing before the Subcommittee on Emergency Preparedness, Response and Communications of the Committee on Homeland Security, House of Representatives, One Hundred Twelfth Congress, first session, October 28, 2011"@en . . . . . . . . . . . . . . . . "Canada" . . . .