and Gunnery Range. Construction included dormitories, equipment, buildings and a small air strip. Since that time, the National Advisory Committee for Aeronautics has announced thatU-2 jet air- craft with special characteristics for flight at exceptionally high altitudes have been flown from the Watertown strip with logis- tical and technical support by the Air Weather Service of the U. 5S. Air Force to make weather observations at heights that cannot be attained by most aircraft. Other Projects at NTS. \ From time to time, the Nevada Test ' Site is the scene of studies or tests of various kinds, because of its isolation or because of the history of previous nuclear detona- tions there. For example in 1955 the Federal Civil Defense Administration conducted its "Operation ARME", an aerial and ground monitoring exercise for FCDA personnel, in Yucca Flat where nuclear detonations had occurred earlier in the year. In April, 1957, high explosives were set off inside a prototype process structure in a remote area of the Test Site to test the explosive-containing characteristics of the structure. Additionally, the Test Site is ~- 23 - ro used from time to time for other similar activities connected with the programs of the AEC, the DOD, the FCDA, or other agencies.