“Department of State to Introduce Passport Card” http://www.state.gov/r/pa/prs/ps/2006/74083.htm
“Secure Electronic Network for Travelers Rapid Inspection” http://www.cbp.gov/xp/cgov/travel/frequent_traveler/sentri/sentri.xml
“NEXUS Program Description” http://www.cbp.gov/xp/cgov/travel/frequent_traveler/nexus_prog/nexus.xml
Alberts, Sheldon. “Canadians to get reprieve on U.S. passport rules.” National Post. June 20, 2007. http://www.canada.com/nationalpost/news/story.html?id=
572ef24d-007b-438c-81b1-824b42bc2833&k=77135
Conlin, Jennifer. “U.S. Plans Alternative to Passport for Region.” New York Times. July 15, 2007.
http://travel.nytimes.com/2007/07/15/travel/15transpass.html.
Higgins, Michelle. “The Clock is Ticking for Winter Travelers.” New York Times. January 14, 2007. http://travel.nytimes.com/2007/01/14/travel/14pracpassport.html.
Palanik, Jacqueline. “Working Nights and Weekends to Process Passports.” New York Times. July 4, 2007. http://www.nytimes.com/2007/07/04/washington/04passport.html?ei=
5070&en=0b11bc93655fcbc6&ex=1185336000&adxnnl=1&adxnnlx=
1185223459-7GLZVJ6rRtzntNQfvE3+vg
Staba, David. “New Passport Rules Bring Worry Over Tourism at Niagara Falls.” New York Times. June 11, 2007. http://travel.nytimes.com/2007/06/11/nyregion/11border.html.
Stables, Eleanor. “Land, Sea Passport Requirements Delayed Until At Least Summer ’08.” Congressional Quarterly. June 20, 2007. http://public.cq.com/docs/hs/hsnews110-000002536288.html.