CAL invented the first crash test dummy in 1948, the automotive seat belt in 1951, the first mobile field unit with Doppler weather radar for weather-tracking in 1956, the first accurate airborne simulation of another aircraft (the North American X-15) in 1960, the first successful demonstration of an automatic terrain-following radar system in 1964, the first use of a laser beam to successfully measure gas density in 1966, the first independent HYGE sled test facility to evaluate automotive restraint systems in 1967, the "mytron", an instrument for research on neuromuscular behavior and disorders in 1969, and the prototype for the Federal Bureau of Investigation's fingerprint reading system in 1972. CAL served as an "honest broker" making objective comparisons of competing plans to build military hardware. It also conducted classified counter-insurgency research in Thailand for the Defense Department. By the time of its divestiture, CAL had 1,600 employees. CAL conducted wind tunnel test on models of a number of skyscraper buildings, including most notably the John Hancock Tower in Boston, Massachusetts and the 40-story Commerce House in Seattle, Washington.