The San Francisco Chronicle wrote:
Mr. Halloran, who earned the nickname Hap because he was always grinning during his early days in the Air Force, gave motivational lectures at military gatherings, corporate events and schools in Japan and the United States. He appeared in numerous World War II documentaries.That's how I knew of him. The nickname "Hap" made him a familiar face not only to me but also to my mom who has done extensive research on World War II. Remembered as a hero, he was a businessman, husband, father, and friend to many. The SF Chronicle article is well worth the read.