He began his photography career while in the army
Aarons served for three years as a combat photographer for Yank magazine. From North Africa to the Middle East and Europe, he recorded the siege of Monte Cassino in Italy, was wounded during the invasion of Anzio and witnessed Rome fall to the Allies. His now famous shot of an American soldier holding a baby in font of joyful crowds massing in the streets became the cover of Yank in July 1944. After leaving the army, Slim became a freelance photojournalist. He vowed he'd never photograph death or destruction again: "I'd wandered through enough concentration camps and bombed-out villages. I'd slept in the mud and been shot at. I owed myself some easy, luxurious living. I wanted to be on the sunny side of the street."