Kathmandu Living Labs' earthquake site collects data about conditions and needs. Each blue dot represents the number of reports of help wanted — medical, food, water or shelter — near Kathmandu. Kathmandu Living Labs hide caption

itoggle caption Kathmandu Living Labs

Canadian-born Omar Khadr is seen in a courtroom sketch during a 2010 hearing at the U.S. military prison at Guantanamo Bay, Cuba. He was moved to a Canadian prison in 2012. Janet Hamlin/AP hide caption

itoggle caption Janet Hamlin/AP

Venezuelan comedian Laureano Marquez performs a stand-up routine at a theater in Caracas last year. Marquez says the government is now cracking down on comedians who make jokes about the government and the country's economic problems. Christian Veron/Reuters/Landov hide caption

itoggle caption Christian Veron/Reuters/Landov

Far more than other Western democracies, Britain concentrates its money, power and culture in the capital, London. Elwin van Eede/Flickr hide caption

itoggle caption Elwin van Eede/Flickr

An airport official walks past a military aircraft destroyed by Saudi-led airstrikes, at the Sanaa International airport in Yemen on Tuesday. Destroyed runways prevent aid from being delivered. Hani Mohammed/AP hide caption

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Now that's a big root: Sweet potatoes aren't tubers, or thickened stems, like potatoes. Sweet potatoes are roots — swollen and packed with starch. U-ichiro Murakami/Flickr.com hide caption

itoggle caption U-ichiro Murakami/Flickr.com

African migrants, many from Eritrea and Sudan, raise their hands as part of a protest at the Holot detention center in southern Israel on Feb. 17, 2014. Tesfai Kidane, an Eritrean who left the center last year and returned to Africa, was later killed by the Islamic State in Libya. It was not clear how he wound up in Libya. Oded Balilty/AP hide caption

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When Dr. Bina Valsangkar had a miscarriage in India, she received state-of-the-art medical care. But just a few miles from the hospital she visited, nurses were struggling to keep up with sick patients. Courtesy of Save the Children hide caption

itoggle caption Courtesy of Save the Children

Helicopter belonging to the Netherlands participates in NATO's Dynamic Mongoose anti-submarine exercise in the North Sea, off the coast of Norway, on May 4, 2015. MARIT HOMMEDAL/AFP/Getty Images hide caption

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Palestinian girls walk past buildings in Gaza City that were destroyed during the 50-day war between Israel and Hamas militants in the summer of 2014. Dozens of Israeli soldiers have now given testimonials saying that indiscriminate firing was tolerated, or even encouraged at times. Thomas Coex /AFP/Getty Images hide caption

itoggle caption Thomas Coex /AFP/Getty Images

The Marquis de Lafayette sailed across the Atlantic to America aboard the original Hermione in 1780 and joined the American rebels in their struggle for independence from Great Britain. This replica will retrace his voyage; it's scheduled to arrive in Yorktown, Va., on June 5. Eleanor Beardsley/NPR hide caption

itoggle caption Eleanor Beardsley/NPR