When was the United States Army Colonel died who wrote the Day After Roswell?
The Day After Roswell: The Day After Roswell is an American book about extraterrestrial spacecraft and the Roswell UFO incident. The Day After Roswell:  It was written by United States Army Colonel Philip J. Corso, with help from William J. Birnes, and was published as a tell-all memoir by Pocket Books in 1997, a year before Corso's death. Philip J. Corso: Philip James Corso (May 22, 1915 – July 16, 1998) was an American Army officer.
July 16, 1998