From a New York Times obit by Neil Genzlinger headlined “Dirck Halstead, Photojournalist Who Captured History, Dies at 85”:

Dirck Halstead, who photographed world-shaking events for half a century for United Press International, Time magazine and other news outlets, sometimes under harrowing conditions, died on Friday in Boquete, Panama. He was 85.

David Hume Kennerly, his friend and a fellow photographer, said the cause was a cerebral hemorrhage.