An installation consisting of a series of bird boxes is displayed in a tree in Duncan Terrace Gardens in Islington on March 24, 2011 in London, England. The boxes by artists Bruce Gilchrist and Jo Joelson of “London Fieldworks”, were designed to reflect the architecture of the Georgian terraces and flats that surround the park in the community gardens. (Photo by Dan Kitwood/Getty Images)

Solana Plains (R) escorts a distraught Elijah West, cousin of Troy Davis, out of the Towaliga County Line Baptist Church that is across from the Jackson State Prison for the planned execution of inmate Troy Davis on September 21, 2011 in Jackson, Georgia. (Photo by Jessica McGowan/Getty Images)

Copies of the Unauthorized Autobiography of Wikileaks founder Julian Assange are on display and on sale in Waterstones bookstore on September 22, 2011in Edinburgh, Scotland. The Wikileaks founder has accused publishers Cannongate of a breach of contract after releasing drafts of his autobiography without his approval. (Photo by Jeff J Mitchell/Getty Images)

A masked Palestinian uses a board to protect himself during clashes with Israeli forces which occurred shortly before Palestinian leader Mahmoud Abbas' speech to the the United Nations General Assembly, on September 23, 2011 in Qalandia, West Bank. (Photo by Ilia Yefimovich/Getty Images)

Singer Jason Derulo performs during his Flash Mob with Knicks City Dancers outside of Madison Square Garden on September 28, 2011 in New York City. (Photo by Mike Coppola/Getty Images)

Miss Venezuela Ivian Sarcos receives her Miss World 2012 sash from Miss World 2011 by Miss World 2010, Alexandria Mills (R) in the Miss world 2011 World Final on November 6, 2011 in London, England. (Photo by Jeremy O'Donnell/Getty Images)

Alan Cumming and Uma Thurman attend the Versace for H&M Fashion event at the H&M on the Hudson on November 8, 2011 in New York City. (Photo by Rabbani and Solimene Photography/Getty Images for Versace for H&M)

Dilwyn Green, from North Wales, holds his 7 month old Gold Silkie Bantam which won a 1st prize in its breed at the Poultry Club's 2011 National Show on November 19, 2011 in Stoneleigh, England. (Photo by Oli Scarff/Getty Images)