Protesters hold a pro-gay-rights flag outside the US Supreme Court on Saturday, countering the demonstrators who attended the March For Marriage in Washington, D.C. The Supreme Court meets on Tuesday to hear arguments over whether same-sex couples have a constitutional right to wed in the United States, with a final decision expected in June. Paul J. Richards/AFP/Getty Images hide caption

An artillery gun fires a round at Taliban fighters in the hills of Nangahar Province. David Gilkey/NPR hide caption

First Lt. Ashley White was one of some 55 to 60 women selected for cultural support teams that deployed to Afghanistan in 2011. She did not make it home. She was the first woman to die and be honored alongside the Army Rangers with whom she served. Courtesy of the White Family hide caption

Tyson Foods says it has already reduced its use of human-use antibiotics by 80 percent over the past four years. Here, Tyson frozen chicken on display at Piazza's market in Palo Alto, Calif., in 2010. Paul Sakuma/AP hide caption

Children aboard this World Airways DC-8 jet were evacuated from Vietnam on April 2, 1975, shortly before the fall of Saigon and just two days before the first official Operation Babylift flight. Among the children was Thanh Jeff Ghar (center, lying by a window), 12. Photo as exhibited at the Presidio's Operation Babylift: Perspectives & Legacies exhibition at the Officers' Club, courtesy of the AP hide caption

Japanese Prime Minister Shinzo Abe in Boston on Monday. Dominick Reuter/AFP/Getty Images hide caption