Supporters of Shaker Aamer, the last British prisoner at Guantanamo Bay, simulate a force feeding outside Downing street in central London, October 24, 2015. Aamer is to be returned to the UK after 13 years at the U.S. detention camp, the Foreign Office said in September. Aamer, a Saudi national who is married to a Briton, was never charged with any crime and had been cleared for release by U.S. authorities in 2007 but was not freed. Saturday marks Aamer's 5,000th day at Guantanamo, according to a press release by the "We Stand With Shaker" campaign. REUTERS/Paul Hackett