Goats climb an argan tree in Morocco to dine on its fruit. Jeremy Horner/Getty Images hide caption

The camp at Mungote is one of the largest for internally displaced persons in the Democratic Republic of Congo, with over 12,000 residents who fled their homes due to ongoing conflict and violence. Giles Clarke/Getty Images hide caption

Students placed their desks across the road, blocking morning rush hour traffic. Moses Muoki/Kenya's Capital News hide caption

Raj Panjabi knows what health care can be like in a developing country. As a boy in Liberia he never had his eyes checked. When he came to the U.S. at age 9, he found out he had 20/80 vision. Last Mile Health hide caption

Leya Jogo, in white, was a widowed grade-school teacher in South Sudan before her village was attacked and she ran for her life. Now, like thousands of her neighbors, she spends every day searching for water for herself and her family. Courtesy of Tim McDonnell hide caption

A Syrian health worker in Aleppo carries a baby injured during the an air strike by Syrian regime forces. Salih Mahmud Leyla/Anadolu Agency via Getty Images hide caption

Mourners carry the coffin of one of six Afghan employees of the Red Cross killed in an attack this week in a remote northern province. Farshad Usyan/AFP/Getty Images hide caption

The Roca brothers, three Spanish chefs, are U.N. goodwill ambassadors and creator of a very special chocolate. Courtesy of El Celler de Can Roca/SDGF hide caption

The nonviolent actions of Dr. King inspired young Kennedy Odede. In this March 21, 1965 file photo, King leads a civil rights march across the Edmund Pettus Bridge in Selma, Ala., to protest voting laws. AP hide caption

Researcher Christian Nawroth with Vern, who lives at the Buttercups Sanctuary for Goats in Kent, England. He thinks Vern was looking to be scratched. Courtesy of Christian Nawroth hide caption

One of the fleet of turboprop ATR planes from Pakistan International Airlines. After a Dec. 7 crash, the ATRs were grounded — and resumed flying (after a goat sacrifice) on Sunday. Farooq Naeem/AFP/Getty Images hide caption

Dr. Raj Panjabi has his blood pressure checked by a Liberian community health worker. Courtesy of Last Mile Health hide caption

A patient is pictured at a camp for diarrhea patients in Dhaka, Bangladesh. Among the past nominations for untold story: the need for vaccines to prevent "severe, deadly diarrhea" in this part of the world. Zakir Hossain Chowdhury/Barcroft Media via Getty Images hide caption

Prisoner guard Thomas Binamo wrote a ballad after his wife died suddenly: "I Will Never Stop Grieving For You, My Wife." Marilena Delli/Six Degrees Records hide caption

Dr. Paul Farmer, co-founder of Partners In Health, stands with Mirlande Estenale in front of what used to be her home in the town of Les Cayes, Haiti. Liz Campa/Partners In Health hide caption