Image 1 of 20: Vehicles belonging to forces loyal to Libyan leader Muammar Gaddafi explode after an air strike by coalition forces, along a road between Benghazi and Ajdabiyah March 20, 2011. REUTERS/Goran Tomasevic

Image 2 of 20: U.S. Navy safety swimmers stand on the deck of the Virginia class submarine USS New Hampshire after it surfaced through thin ice during exercises underneath ice in the Arctic Ocean north of Prudhoe Bay, Alaska March 19, 2011. REUTERS/Lucas Jackson

Image 3 of 20: Riot police officers shield themselves from fireworks launched at them by protesters during a demonstration in Oued Koriche, Algiers March 23, 2011. The protesters were demonstrating against a plan by the authorities to demolish houses built without proper approval. REUTERS/Louafi Larbi

Image 4 of 20: Israeli police explosives experts survey the scene of an explosion in Jerusalem March 23, 2011. A bomb exploded near a bus stop in a Jewish district of Jerusalem on Wednesday, killing a woman and injuring at least 30 people, in an attack police blamed on Palestinian militants. REUTERS/Ronen Zvulun

Image 5 of 20: Family members watch as the coffin of Lance Corporal Tasker is carried after his funeral service at Tayport Parish Church, in Tayport, Scotland March 22, 2011. Lance Corporal Tasker was killed by small arms fire in Afghanistan while on duty with his dog Theo. Theo died soon after, suffering a seizure on return to their base. REUTERS/David Moir

Image 6 of 20: A dancer stretches her feet as she waits for her turn to dance during an audition for “The Red Shoes” production of Ballet Madrid in Madrid March 22, 2011. REUTERS/Susana Vera

Image 7 of 20: People whose homes were destroyed by the tsunami take a bath in a tent set up by Japan’s Self Defense Force in Kamaishi after the area was devastated by a magnitude 9.0 earthquake and tsunami March 22, 2011. REUTERS/Damir Sagolj

Image 8 of 20: A woman stands among praying women during a rally demanding the ouster of Yemen’s President Ali Abdullah Saleh outside Sanaa University March 23, 2011. REUTERS/Ammar Awad

Image 9 of 20: A miner climbs on excavated rocks after a giant drill machine broke through at the final section Sedrun-Faido, at the construction site of the NEAT Gotthard Base Tunnel March 23, 2011. Crossing the Alps, the world’s longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles). REUTERS/Arnd Wiegmann

Image 10 of 20: A piano is submerged in water in the area devastated by tsunami in Rikuzentakat March 21, 2011. REUTERS/Damir Sagolj

Image 11 of 20: People celebrate atop a destroyed mobile artillery piece belonging to forces loyal to Libyan leader Muammar Gaddafi after an air strike by coalition forces, along a road between Benghazi and Ajdabiyah March 20, 2011. REUTERS/Suhaib Salem

Image 12 of 20: A rebel fighter points his gun at a suspected Gaddafi supporter as other rebels try to protect the suspected supporter, on a road between Benghazi and Ajdabiyah, near Ajdabiyah March 21, 2011. REUTERS/Goran Tomasevic

Image 13 of 20: Sasha Obama, younger daughter of U.S. President Barack Obama, runs across the tarmac to her car as her father participates in a welcome ceremony (background) upon their arrival in Santiago March 21, 2011. REUTERS/Jason Reed

Image 14 of 20: Marus, 7, warms his hands next to a portable stove as warm up his hands before going to school on the eviction day of their trailer and bus home in Las Tablas, northern Madrid, March 21, 2011. Two Romanian gypsy families of four adults and ten children had been living in the bus and trailer since 2008, but they were evicted Monday under orders from Madrid’s town planning board. Both the bus and trailer were torn down while the older children were at school. The two families will each be moved to separate Roma camps on the outskirts of Madrid. REUTERS/Susana Vera

Image 15 of 20: Suspected Colombian drug trafficker Gloria Rojas (C) tosses her hair as she is escorted by police officers during her extradition to the U.S. at Simon Bolivar Airport in Caracas March 21, 2011. REUTERS/Carlos Garcia Rawlins

Image 16 of 20: A demonstrator shows his bottom to riot police during a protest by European workers and trade union representatives to demand better job protection in the European Union countries in Brussels March 24, 2011. Tens of thousands of people marched through Brussels on Thursday to urge European leaders holding a two-day summit in the Belgian capital to scrap or ease austerity measures, which unions say will slow economic recovery and punish the poor. REUTERS/Thierry Roge

Image 17 of 20: Residents try to get into a bus at the bus station of Adjame in Abidjan March 20, 2011. Thousands of Ivorians fleeing violence in the commercial capital Abidjan gathered in its main bus station on Sunday, crowding onto buses carrying suitcases full of belongings they had salvaged to head to the countryside. REUTERS/Luc Gnago

Image 18 of 20: A man slides down a big water slide at a water park in Lima March 20, 2011, ahead of World Water Day on Tuesday. REUTERS/Enrique Castro-Mendivil

Image 19 of 20: Canoes used for siphoning crude oil to illegal oil refinery are scattered on a creek in Ogoniland outside Port Harcourt in Nigeria’s Delta region March 24, 2011.Crude oil thieves — known locally as “bunkerers” — have been a fact of life for years in Africa’s biggest oil and gas industry, puncturing pipelines and costing Nigeria and foreign oil firms millions of dollars in lost revenues each year. REUTERS/Akintunde Akinleye

Image 20 of 20: Ducks swim past a submerged vehicle after the earthquake and tsunami in Yamada town, Iwate Prefecture in northern Japan, March 24, 2011. REUTERS/Carlos Barria