Something of an early version of THE RIGHT STUFF (1983), ON THE THRESHOLD OF SPACE paid tribute to the men who were laying the groundwork for man's exploration of space. The filmmakers tried for an accurate depiction of the ongoing research and testing, relying heavily on U.S. Air Force
input and shooting on location at air bases in Florida (Eglin) and New Mexico (Holloman). Madison stars as an Air Force physician who undergoes extensive tests in an effort to determine how the human body will respond to the expected stress and strain of space travel. The rigors include being
ejected in a space capsule from a jet at the altitude of 45,000 feet, traveling at 1,000 mi...