Terrorism and border control : an overview / Edward Alden -- U.S. borders must be the first line of defense / Stewart Baker -- U.S. borders should be the last line of defense / Margaret D. Stock -- Keeping the borders open harms U.S. workers / Steven A. Camarota -- Keeping the borders open does not harm U.S. workers / Martin Oppenheimer -- The United States should adopt open immigration / Anthony Gregory -- The United States should not adopt open immigration / Stephen Cox -- A border fence will reduce illegal crossings of the U.S.-Mexico border / Ronald D. Vitiello -- A border fence will not reduce illegal crossings of the U.S.-Mexico border / Daniel B. Wood -- A border fence will harm the environment / Glenn Hurowitz -- A border fence will harm poor U.S. citizens / Melissa del Bosque -- The Minutemen have helped secure the border / Glynn Custred -- The Minutemen have not helped to secure the border / David Neiwert -- The possibility of a pandemic should result in border closure / NBC's The Today Show -- The possibility of a pandemic should not result in border closure / Jena Baker McNeill and James Jay Carafano -- Organizations to contact.