Filipino men stand in line to fill containers with gas in Tacloban, Philippines, on Sunday. The area experienced widespread gas shortages in the wake of Typhoon Haiyan. David Gilkey/NPR hide caption

itoggle caption David Gilkey/NPR

A Filipino woman prays at morning Mass at Santo Nino church, which was damaged by Typhoon Haiyan in Tacloban, Philippines, on Sunday. David Gilkey/NPR hide caption

itoggle caption David Gilkey/NPR

Young students in a Bridge International Academy school in Nairobi, in September. On the surface, there's little to distinguish these schools from others in the developing world. But Bridge's model relies on teachers reading lessons from tablets. Frederic Courbet for NPR hide caption

itoggle caption Frederic Courbet for NPR

Military personnel from the U.S. and the Philippines unload relief goods at the Tacloban airport, Nov. 11, 2013. Some reports estimate that 10,000 people may have died in the city of Tacloban. Ted Aljibe/AFP/Getty Images hide caption

itoggle caption Ted Aljibe/AFP/Getty Images

A doctor vaccinates a child against polio at a health clinic in Damascus, Syria, on Nov. 6. To stop the disease from spreading beyond Syria, health officials plan to vaccinate 20 million children in the region. Youssef Badawi/EPA /LANDOV hide caption

itoggle caption Youssef Badawi/EPA /LANDOV

The Ethiopian government has set up about a dozen vaccination booths along its thousand-mile border with Somalia. Jason Beaubien/NPR hide caption

itoggle caption Jason Beaubien/NPR