

Romie Perez and Elia Zamarripa at Perez's house. The two are among the many holding impromptu cookouts to make meals for the families of the victims. Nurith Aizenman/NPR hide caption
Volunteers unload food aid in Chena, Ethiopia, one of many parts of the world where conflict has fueled hunger. Jemal Countess/Getty Images hide caption
A driver sits in the cab of a combine harvester during the summer harvest in a field of wheat in Varva, Ukraine. Ukraine accounts for more than 10% of the global wheat market. Russia's war threatens to disrupt the spring planting season. Vincent Mundy/Bloomberg via Getty Images hide caption
Dr. Paul Farmer, photographed in 2017 at a screening of a film about his life's work, Bending the Arc. Desiree Navarro/Getty Images hide caption
A student washes her hands before entering a classroom at a school in Blantyre, Malawi, in March 2021. Top scientists say that many African countries, including Malawi, appear to have already arrived at a substantially less threatening stage of the coronavirus pandemic. Joseph Mizere/Xinhua News Agency/Getty Images hide caption
Here's a computer-generated image of the omicron variant of the coronavirus — also known as B.1.1.529. Reported in South Africa on Nov. 24, this variant has a large number of mutations, some of which are concerning. Uma Shankar Sharma/Getty Images hide caption