Ultra-Orthodox Jewish men dance while celebrating the Jewish holiday of Purim at a synagogue in Bnei Brak early morning Saturday, March 20. Purim is a celebration of the Jews' salvation from genocide in ancient Persia, as recounted in the Book of Esther. Nir Elias/Reuters
President Obama, accompanied by his daughters Malia, bottom right, Sasha, top left, and his wife, first lady Michelle Obama, arrives in Rio de Janeiro Saturday. Felipe Dana/AP
A street vendor sits in a market in Port-au-Prince, Haiti, Saturday. Haitian voters will choose one of two candidates, Michel Martelly and Mirlande Manigat, on Sunday in the second round of the presidential election. Alexandre Meneghini/AP
A shot-down warplane is seen, as the pilot parachutes out of it, over the outskirts of Benghazi, eastern Libya, Saturday. The Libyan plane is believed to have been shot down by anti-government rebels in Benghazi. Anja Niedringhaus/AP
US Secretary of State Hillary Rodham Clinton arrives Saturday at the Elysee palace, in Paris for a crisis summit on Libya. Remy de la Mauviniere/AP
BYU's James Anderson (l) and Stephen Rogers(r) battle for a rebound against Gonzaga's Robert Sacre in the second half of a Southeast regional third round NCAA tournament college basketball game, Saturday, in Denver. BYU won 89-67. Jack Dempsey/AP
The moon rises over the Bronx section of New York City Saturday. This full moon is called a "Super Moon"as it arrives at its closest point to the Earth in 2011, a distance of 221,565 miles away. Mike Segar/Reuters
A man walks past a store building tangled with fishing nets and buoys washed away by the March 11 tsunami in Minamisanrikucho, Miyagi Prefecture, Japan, Saturday. Kyodo News/AP
Oklahoma guard Aaryn Ellenberg (r) drives past James Madison guard Courtney Hamner (l) during in the first round of the NCAA women's college basketball tournament, Sunday, in Charlottesville, Va. Andrew Shurtleff)/AP
Supporters of Egyptian reform campaigner and Nobel laureate Mohamed ElBaradei, front center with dark jacket, try to protect him as angry protesters shout slogans as he arrives to cast his vote outside a polling center in Cairo's Mokkatam district, Saturday. Ahmed Ali/AP
Residents of Tarabuco smile during "pujllay" celebrations in Tarabuco, Bolivia, Sunday . "Pujllay" commemorates Tarabuco's indigenous culture during which members of the community perform music and dance, and present an offering (Pucara) to Mother Earth. David Mercado/Reuters
Electoral workers count ballots at a polling station at the end of a presidential runoff in Port-au-Prince, Haiti, Sunday. Haiti's voters will choose between candidates Mirlande Manigat, the former first lady, and Michel "Sweet Micky" Martelly, a star of Haitian music to lead a country where anger with the government runs deep and nearly a million people are living on the streets. Dieu Nalio Chery/AP
The Department of Defense opened its second Defense Innovation Unit Experimental in Boston in hopes of working more closely with researchers and academics to sharpen its ability to confront Digital Age threats.
ByJoshua Eaton, Correspondent
Department of Defense/Reuters
The Pentagon is setting up outposts in innovation centers outside its Washington headquarters to give US warfighters better technology when confronting enemies — whether in cyberspace or on the physical battlefield.