The star of the Roswell incident, Major Jesse Marcel, states in this 1979 interview that "It was not a weather balloon, nor an aircraft, nor a missile."
In other interviews, he said "Ive see rockets sent up at the White Sands testing grounds. It definitely was not part of an aircraft, nor a missile or a rocket." http://www.nmsr.org/roswell.htm
So, it was not an aircraft, a missile, a rocket ... or an interplanetary ship!
Mr. Dave Thomas is a physicist and mathematician, and is president of the science group New Mexicans for Science and Reason. Dave also is a Fellow of CSI (Committee for Skeptical Inquiry), the publishers of Skeptical Inquirer.