If Norman Rockwell had used a camera instead of a paintbrush, his artistry might have looked something like Allan Grant’s. Grant (1919-2008) specialized in capturing the lighthearted side of American life, and his work often appeared in LIFE’S Speaking of Pictures section, a repository for humorous or otherwise striking images. If his reputation was as the man responsible for laughs, he also made pictures that were anything but funny: a bewildered Marina Oswald shortly after her husband had shot President Kennedy, a grim Marilyn Monroe just before she died. Grant had aspired to be an aeronautical engineer—he loved photographing aircraft—but never regretted his choices, nor where he wound up. “Staff photographers, freelancers and everyone who owned a camera,” he said, “were all hoping to get published in LIFE. It was like getting one week of fame instead of the 15 minutes Andy Warhol talked about.”