In this picture taken with a long time exposure a man walks besides a piano, part of the installation 'Klinger - Landscapes of Melancholy' of of German artist rosalie during the press preview of the exhibition 'World Creators: Richard Wagner, Max Klinger, Karl May' on the occasion of the 200th birthday of Richard Wagner in the Museum of Fine Arts in Leipzig, central Germany. Jens Meyer/AP
Shaven-headed young boys operate smartphones at SK Telecom T.um Museum in Seoul, South Korea. They are among ten children who entered a temple to have an experience of monks' life for three weeks, called Little Buddha Camp, to celebrate upcoming Buddha's birthday on May 17. Ahn Young-joon/AP
A police officer stands between two police horses ahead of the Europa League final soccer match between Benfica and Chelsea at ArenA stadium in Amsterdam, Netherlands. Peter Dejong/AP
A giant shoe is pictured outside a life-size 'Barbie Dreamhouse' of Mattel's Barbie dolls in Berlin. The life-sized house, covering about 1,400 square metres offers visitors to try on Barbie's clothes in her walk-in closet, and tour her living room and kitchen. Fabrizio Bensch/Reuters
Pilgrims leave a boat during their way to the shrine of El Rocio in the Donana National Park, southern Spain. Every spring, hundreds of thousands of devotees converge at a shrine to pay homage to the Virgin del Rocio during an annual pilgrimage. Marcelo del Pozo/Reuters
Palestinian refugees, wearing military outfits, perform to national songs during a parade to mark the 65th anniversary of Nakba, at Ain al-Hilweh Palestinian refugee camp near the port-city of Sidon, southern Lebanon. Ali Hashisho/Reuters
A Rohingya Muslim woman wearing traditional thanaka paste on her face passes the time at a camp for people displaced by violence, near Sittwe Picture, taken April 26, 2013. Damir Sagolj/Reuters
Anas al-Kesby, a Palestinian refugee, tends to his pigeons on the roof of his family house, at Baqaa Palestinian refugee camp northwest of Amman, Jordan, on the 65th anniversary of 'nakba,' Arabic for 'catastrophe,' the term used to mark the events leading to Israel's founding in 1948. Mohammad Hannon/AP
A handler steadies his Teeswater sheep in the ring on the first day of the Balmoral Show in northern Ireland. The show is Ireland's biggest agricultural and food event. Cathal McNaughton/Reuters
Kentucky Derby winner Orb attempts to snack on decorative flowers, against the wishes of training rider Jennifer Patterson, after a training session in preparation for the upcoming 138th running of the Preakness Stakes at Pimlico Race Course in Baltimore. The Preakness Stakesi is the second leg of US thoroughbred racing's Triple Crown. Jonathan Ernst/Reuters
Actor Leonardo DiCaprio poses for photographers during a photo call for The Great Gatsby at the 66th international film festival, in Cannes, southern France. Francois Mori/AP
US Soldiers with the 525th Battlefield Surveillance Brigade advance through a tunnel while conducting riot control operations during a Kosovo Force (KFOR) mission rehearsal exercise (MRE) at the Joint Multinational Readiness Center in Hohenfels, Germany in this photo released on May 15, 2013. The KFOR 17 MRE was designed to prepare the U.S. Army's 525th Battlefield Surveillance Brigade for operations in support of NATO in Kosovo. Bryan Rankin/U.S. Army/DoD/Reuters
Belyana (top), a female Snow Fox, and her cub are seen inside a cage at the Royev Ruchey zoo on the surburbs of Russia's Siberian city of Krasnoyarsk,. Ilya Naymushin/Reuters
People eat take away food as they have a break, in the business district of La Défense, Paris. Christophe Ena/AP
In a statement marking the fifth anniversary of Gross's detention earlier this month, Obama hinted that his release could lead to a thaw in relations with Cuba. Many are watching to see if this could lead to an end of the decades-long US economic embargo.
American Alan Gross has been released from a Cuban prison after five years, as part of an agreement that also includes the release of three Cubans jailed in the United States, senior U.S. officials said Wednesday.