Health workers wash their hands after taking a blood sample from a child to test for the Ebola virus. On Tuesday, the workers tested people in the village outside Monrovia where a 17-year-old boy died of the disease over the weekend. Abbas Dulleh /AP hide caption

itoggle caption Abbas Dulleh /AP

Police patrol the beach at Sousse, Tunisia, on Sunday. Tunisian authorities have deployed additional security forces, closed some mosques and banned some Islamist groups in the wake of Friday's terrorist attack at a beachfront hotel. Abdeljalil Bounhar/AP hide caption

itoggle caption Abdeljalil Bounhar/AP

Philip Cheruiyot (second from left) leans in to read the song titles on the CD booklet brought by Diane Thram. Cheruiyot's grandfather sang on Hugh Tracey's recording of "Chemirocha II." Ryan Kailath hide caption

itoggle caption Ryan Kailath

The body of a tourist lies near a beachside hotel in Sousse, Tunisia. Dozens of people were killed Friday when at least one gunman opened fire at the hotel, an interior ministry spokesman said. Amine Ben Aziza/Reuters/Landov hide caption

itoggle caption Amine Ben Aziza/Reuters/Landov

At the health clinic in Minjibir, Nigeria, a child is immunized for polio. David Gilkey/NPR hide caption

itoggle caption David Gilkey/NPR
Screengrab from the film, Present Tense.

A worker at Boka Tobacco auction floors displays some of the tobacco crop, in Harare, Zimbabwe, Tuesday May 14, 2013. The country's tobacco selling season kicked off in February and to date tobacco worth over $400 million dollars has been sold to buyers mostly from China and the European Union. Tsvangirayi Mukwazhi/AP hide caption

itoggle caption Tsvangirayi Mukwazhi/AP

A police officer guards the home of a family under a 21-day Ebola quarantine in Freetown, Sierra Leone, back in March. Michael Duff/AP hide caption

itoggle caption Michael Duff/AP

Some 800 migrants from the Middle East arrive at the Greek port of Piraeus on Sunday. Smugglers are charging thousands of dollars to take migrants across the Mediterranean, and prices can vary widely. Children are often allowed to travel for free. Anadolu Agency/Getty Images hide caption

itoggle caption Anadolu Agency/Getty Images