Since opening in 1963, the Manned Spaceflight Center (now called the Johnson Space Center) had been the hub of the agency’s operations—not just during missions, but also through much of the technology development and astronaut training programs. Building 30 was the center of it all. Its control room, with its four rows of grey IBM computer consoles, gauges, dials, and meters, monitored some 1,500 items of constantly changing information. Within the control room, teams of mission experts worked round the clock during missions, overlapping with each other in four eight-hour shifts codenamed green, white, black, and maroon. These controllers’ average age was only 32, and most had degrees in engineering, mathematics, or physics. Each team was responsible to a flight director; the maroon team was led by Milt Windler, black by Glynn Lunney, white by Gene Kranz, and green by Cliff Charlesworth, who was in overall charge of the Apollo 11 mission.