A 500-pound bomb supplied by the United States appears to have been used in the Oct. 18 strike, according to video footage examined by The New York Times.

© Reuters, via Al-Masirah TV

Hours after the Russian attack, which killed at least 31 and left dozens missing, the United States said that peace talks with the two countries would resume after nine months.

© Reuters

As many as 40 percent of injured soldiers face severe infections that can lead to amputations and death. One initiative is trying to fix that.

© Johanna-Maria Fritz for The New York Times

The day that changed modern China also taught me how to recognize true courage.

© Peter Turnley/Getty Images