Commentary

Bush G W , 2006. “Introductory speech at the signing of the Secure Fence Act”, The Roosevelt Room, The White House, Washington, DC, 26 October.

Hamilton W , 2006, “A fence with more beauty, fewer barbs” The New York Times 18 June, section Week in Review.

Hendricks T , 2007, “Study: Price for border fence up to $49 billion: Study says fence cost could reach $49 billion/lawmakers' estimate falls far short of total, research service says” San Francisco Chronicle 8 January, page B-1.

Hsu S S , 2009, “Border deaths are increasing: Rise is despite fewer crossers, U.S. and Mexican Groups Say” Washington Post 30 September.

McLemore D , 2007, “Texas to see border fence construction next year despite opposition: Rio Grande set for 150 miles of barriers” The Dallas Morning News 5 December.

Napolitano J , (Governor), 2007, “Address to the National Press Club regarding immigration, border security”, Washington DC, 27 February.

Obrist H U , 2003, “Part 1: On Berlin's new architecture”, in Interviews, Volume I Fondazione Pitti Immagine Discovery, Charta, Milan, pp 507–528.

Roosevelt F D , 1999, “Four freedoms”, in Great Speeches Ed. Grafton J , (Dover Publications, New York) page 93.

Solar Buzz , 2011, “Fast solar energy facts”, http://www.solarbuzz.com/FastFactsGermany.htm.