Hal Buell, who led The Associated Press’ photo operations from the darkroom era into the age of digital photography over a four-decade career that included 12 Pulitzer Prizes, has died. He was 92. Buell died Monday in Sunnyvale, California, where his daughter lived, after battling pneumonia. Colleagues described Buell as a “visionary” who encouraged photographers to try new ways of covering hard news. Buell spent a large part of his AP career as the editor in charge of the news services’ photos. He worked in 33 countries, with legendary AP photographers including Eddie Adams, Horst Faa...