Allied troops at the ANZAC Cove in the Gallipoli peninsula, during World War I. Britain, France, Australia and New Zealand fought for nine months but could not defeat the Ottomans. Overall, a half-million were killed or wounded. Hulton Archive/Getty Images hide caption

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Mohammed Ali Malek is seen at Catania's tribunal, on Friday. Italian prosecutors blamed the captain of a grossly overloaded fishing boat for a collision that capsized and sank his vessel off Libya, drowning hundreds of migrants. Antonio Parrinello/Reuters/Landov hide caption

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"Today's protests have become a bit like climbing Mt. Everest with the help of 60 Sherpas, and the Internet is our Sherpa." — Zeynep Tufekci James Duncan Davidson/TED hide caption

itoggle caption James Duncan Davidson/TED

In this photo made available Thursday, April 23, 2015, migrants crowd and inflatable dinghy as the Italian Coast Guard approaches them, off the Libyan coast, on Wednesday. Alessandro Di Meo/AP hide caption

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Supporters of the Shiite Houthi movement brandish weapons as they take part in a demonstration in Yemen's capital of Sanaa on Thursday, protesting the Saudi-led military "Decisive Storm" air campaign. Mohammed Huwais/AFP/Getty Images hide caption

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Chantel, 3, and Antoni, 7 months, migrated to Spain from their native Cameroon, with their mother Tatiana Kanga, 25. Tatiana was nine months pregnant with Antoni when they crossed the Mediterranean Sea together in an inflatable boat. Lauren Frayer/NPR hide caption

itoggle caption Lauren Frayer/NPR