(01 of12)
Open Image ModalPrime Minister David Cameron and his wife Samantha visit the Titanic Studios in Belfast, where they saw the film sets for the TV drama Game of Thrones and were given a guided tour by weapons master Tommy Dunn (second left). (credit:Stefan Rousseau/PA Wire)
(02 of12)
Open Image ModalSamantha Cameron during a visit to the Titanic Studios in Belfast, where she and Prime Minister David Cameron saw the film sets for the TV drama Game of Thrones. (credit:Stefan Rousseau/PA Wire)
(03 of12)
Open Image ModalThe Mersey Ferry 'Snowdrop' which was recently unveiled painted in a Dazzle Ship design by artist Sir Peter Blake sets sail from Seacombe ferry terminal across a fog covered River Mersey towards Liverpool, north-west England on April 07, 2015. AFP PHOTO/PAUL ELLIS (Photo credit should read PAUL ELLIS/AFP/Getty Images) (credit:PAUL ELLIS via Getty Images)
(04 of12)
Open Image ModalColourful cosmic curtains - This dramatic panorama shows a colourful, shimmering auroral curtain reflected in a placid Icelandic lake. The image was taken on 18 March 2015 by Carlos Gauna, near Jökulsárlón Glacier Lagoon in southern Iceland. (credit:C. Gauna/ESA)
(05 of12)
Open Image ModalUS First Lady Michelle Obama(R) performs with the cast of 'So You Think You Can Dance All Stars' during the annual Easter Egg Roll on the South Lawn of the White House April 6, 2015 in Washington, DC. AFP PHOTO/BRENDAN SMIALOWSKI (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images) (credit:BRENDAN SMIALOWSKI via Getty Images)
(06 of12)
Open Image ModalBritain's Prime Minister David Cameron, left, and his wife Samantha eat breakfast during a visit to financial firm Scottish Widows in Edinburgh, Scotland Tuesday, April 7, 2015. Britain goes to the polls in a General Election on May 7. (AP Photo/Kirsty Wigglesworth, Pool) (credit:ASSOCIATED PRESS)
(07 of12)
Open Image ModalCAPE TOWN, SOUTH AFRICA - APRIL 6: A group of students gather to commemorate killed on Al-Shabaab terrorists' gun attack in Garissa University College, in front of Leo Marquard Residence, on April 06, 2015, in Cape Town, South Africa. At least 147 students were killed and 79 injured, four militants killed after Al-Shabaab's terrorist attack at Kenya's Garissa University College on 2nd of March 2015. (Photo by Ashraf Hendricks/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
(08 of12)
Open Image ModalTRABZON, TURKEY - APRIL 7 : Turkish Police officers detain Nihat S. (2nd L) over Saturday's armed attack on Fenerbahce team bus in Trabzon, Turkey on April 7, 2015. (Photo by Hakan Burak Altunoz/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
(09 of12)
Open Image ModalMUMBAI, INDIA - APRIL 6: An Indian salt lake worker unloads salt from a basin onto a stockpile at a salt pan in Mumbai, India on April 06, 2015. (Photo by Imtiyaz Shaikh /Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
(10 of12)
Open Image ModalBritain's Prince Harry, right, reacts after shaking hands with kids holding up a sign reading "Red Heads Rule" during a visit to the Australian War Memorial in Canberra, Australia, Monday, April 6, 2015. Prince Harry, or Captain Harry Wales as he is known in the British Army, will end his military career with a month long assignment with the Australian Defense Force in barracks in Sydney, Perth and Darwin. (AP Photo/Lukas Coch, Pool) (credit:ASSOCIATED PRESS)
(11 of12)
Open Image ModalFirefighters battle a blaze after an explosion at a plant producing paraxylene - a chemical commonly known as PX - in Zhangzhou, east China's Fujian province on April 7, 2015. Fourteen people were injured in an explosion at a controversial chemical plant in the eastern Chinese city of Zhangzhou, authorities said on April 7, the second accident at the site in two years. CHINA OUT AFP PHOTO (Photo credit should read STR/AFP/Getty Images) (credit:STR via Getty Images)
(12 of12)
Open Image ModalPOOLE, ENGLAND - APRIL 6: Prime Minister David Cameron speaks with Lilli Docherty and her daughter Dakota, as he has lunch with people who have benefited from tax and pension changes that come into force, in a garden on April 6, 2015 near Poole, England. Britain goes to the polls for a general election on May 7. (Photo by Kirsty Wigglesworth - WPA Pool/Getty Images) (credit:WPA Pool via Getty Images)