More than 24,000 people have signed the Change.org petition requesting that the museum add Chapman’s story to approximately 200 focused presentations when it opens next month in Arlington, Texas.

On the night of Feb. 24, 1969, Airman 1st Class Levitow was serving as the loadmaster aboard an AC-47, codename “Spooky 71,” as it patrolled the night sky around Tan Son Nhut Air Base when a call came ...