of NBC proved to be a major benefit, as that network was instructed to promote its color program offerings; even so, it was not until 1968 that color television sales in the United States surpassed those of black-and-white sets. While lauding the technical prowess of his RCA engineers who had developed color television, David Sarnoff, in marked contrast to William Paley, president of CBS, did not disguise his dislike for popular television programs. His authorized biography even boasted that "no one has yet caught him in communion with one of the upper dozen or so top-rated programs" and "The popular programs, to put the matter bluntly, have very little appeal for him." RCA professional video cameras and studio gear, particularly of the TK-40/41 series, became standard equipment at many American television network affiliates, as RCA CT-100 ("RCA Merrill" to dealers) television sets introduced color television to the public. Diversification In 1941, shortly before the United States entered World War II, the cornerstone was laid for a research and development facility in Princeton, New Jersey called RCA Laboratories. Led for many years by Elmer Engstrom, it was used to develop many innovations, including color television, the electron microscope, CMOS-based technology, heterojunction physics, optoelectronic emitting devices, liquid crystal displays (LCDs), videocassette recorders, direct broadcast television, direct broadcast satellite systems and high-definition television. RCA plants switched to war production shortly after the U.S. entered the war in December 1941. The company began work on a secret project for the U.S. Navy called Madame X. in September 1942. The Bloomington, Indiana, plant was one of the first of five RCA plants to produce Madame X. Madame X was a VT fuse, which is a proximity fuse used to electronically detonate a projectile's payload when it was in range of its target, as opposed to relying on a direct hit. James V. Forrestal, former secretary of the Navy said, "The proximity fuse had helped blaze the trail to Japan. Without the protection this ingenious device has given the surface ships of the fleet, our westward push could not have been so swift and the cost in men and ships would have been immeasurably greater." During World War II, RCA was involved in radar and radio development in support of the war effort, and ranked 43rd among United States corporations in the value of wartime military production contracts. During and after the war, RCA set up