=Aircraft.= Aircraft seemed just as unlikely as missiles to have been responsible for the extraterrestrial claims as outlined in the profile. Although additional research revealed the significant role dummies played in the test and evaluation of aircraft emergency escape systems, these dummies were used on board aircraft and on the high-speed test track at Holloman AFB. However, aircraft test flights demanded strict adherence to established flight profiles over the instrumented portions of the White Sands Missile Range, many miles from the alleged crash sites. Dummies used on the high-speed track remained in the immediate vicinity of the track facilities at Holloman AFB. This geographical impossibility ruled out dummies that were ejected from aircraft and those used on the high-speed track as a cause of alleged alien sightings. (Aircraft accidents will be discussed extensively in Section Two of this report.) [Illustration: Figs. 12 & 13. Missiles (_left_) and drones (_right_) under development at Holloman AFB, N.M. were determined not to have been involved in the “Roswell Incident.” (_U.S. Air Force photos_)] =High Altitude Research Balloons.= The only vehicles not yet evaluated as a possible source of the accounts were high altitude research balloons. Previous reviews of early research balloon flight records revealed that trajectories of high altitude balloons were, at times, unpredictable and did not usually remain over Holloman AFB or White Sands Missile Range.[28] Many of the scientific payloads required recovery so the data collected during flight could be returned to the laboratory for analysis. These characteristics seemed to fit at least some of the research profile. Atmospheric sampling apparatus or weather instruments, the typical payload of many high altitude balloons, could hardly have been mistaken for space aliens. A careful examination of the instruments carried aloft by the high altitude balloons revealed that one unique project used a device that very likely could be mistaken for an alien—an anthropomorphic dummy. An anthropomorphic dummy is a human substitute equipped with a variety of instrumentation to measure effects of environments and situations deemed too hazardous for a human. These abstractly human dummies were first used in New Mexico in May 1950, and have been used on a continuous basis since that time.[29]