Firemen extinguish a fire at a gypsum manufacturing plant after shelling in the city of Bakhmut, in the eastern Ukrainian region of Donbas, on Friday. Russia pressed on with a deadly offensive to capture key points in the Donbas this week. Aris Messinis/AFP via Getty Images hide caption
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Former President Donald Trump speaks at a campaign rally in Greensburg, Pa., on May 6. A federal judge on Friday dismissed Trump's lawsuit against New York Attorney General Letitia James, allowing her civil investigation into his business practices to continue. Gene J. Puskar/AP hide caption
People walk past a Covid testing site on May 17. in New York City. New York's health commissioner, Dr. Ashwin Vasan, has moved from a "medium" COVID-19 alert level to a "high" alert level in all the five boroughs following a surge in cases. Spencer Platt/Getty Images hide caption
Attendees during a closing campaign rally for presidential candidate Gustavo Petro in Bogotá, Colombia. Petro is ahead in the polls for this Sunday's election, but it's expected to go to a second round in June. Andres Cardona/Bloomberg/Getty Images hide caption
Colombia goes into elections Sunday with a leftist looking to make history
Uvalde elementary school shooting
Texas' school security efforts following the 2018 Santa Fe shooting have largely ignored gun safety
Texas StandardMass shootings are so common that mayors now have a checklist for when one happens
Gun control advocacy groups rally with Democratic members of Congress outside the U.S. Capitol on May 26, 2022. Organized by Moms Demand Action, Everytown for Gun Safety, and Students Demand Action, the rally brought together members of Congress and gun violence survivors to demand gun safety legislation following mass shootings in Buffalo, N.Y., and Uvalde, Texas. Chip Somodevilla/Getty Images hide caption
A cross and Bible sculpture stand outside the Southern Baptist Convention headquarters in Nashville, Tenn., on Tuesday. Southern Baptist leaders have released a list of hundreds of pastors and other church-affiliated personnel accused of sexual abuse. Holly Meyer/AP hide caption
Black artists have always led AIDS activism. This tribute wants to give them credit
This photo of a professor wearing a mask went viral. So did his response to critics
Black or brown hydrogen is extracted from coal. Gray hydrogen is made by heating natural gas. Both create carbon dioxide. Blue hydrogen captures about 90% of that carbon dioxide and stores it, usually underground. Green hydrogen uses renewable energy to split hydrogen out of water using electricity. Pink hydrogen does the same but relies on nuclear power. Meredith Miotke for NPR hide caption