The armed group JNIM claimed to have seized two key cities and destroyed the defense minister’s residence in a coordinated offensive that experts said was a major escalation in yearslong hostilities.

Ernie Dosio, 75, of Lodi, Calif., was hunting a species of antelope in the dense forests of Gabon when his hunting party stumbled on a small herd of female elephants with calves.

A once-robust H.I.V. treatment and prevention system, credited with saving hundreds of thousands of lives, has begun to crumble.