Standard time
In 1870 Charles F. Dowd proposed four time zones based on the meridian through Washington, DC for North American railroads. In 1872 he revised his proposal to base it on the Greenwich meridian. Sandford Fleming, a Scottish-born engineer operating in Canada, proposed worldwide Standard Time at a meeting of the Royal Canadian Institute on February 8, 1879. Cleveland Abbe advocated standard time to better coordinate international weather observations and resultant weather forecasts, which had been coordinated using local solar time. In 1879 he recommended four time zones across the contiguous United States, based upon Greenwich Mean Time. The General Time Convention (renamed the American Railway Association in 1891), an organization of US railroads charged with coordinating schedules and operating standards, became increasingly concerned that if the US government adopted a standard time scheme it would be disadvantageous to its member railroads. William F. Allen, the Convention secretary, argued that North American railroads should adopt a five-zone standard, similar to the one in use today, to avoid government action. On October 11, 1883, the heads of the major railroads met in Chicago at the Grand Pacific Hotel and agreed to adopt Allen's proposed system.
North American Aerospace Defense Command
The North American Air Defense Command was recommended by the Joint Canadian–U.S. Military Group in late 1956, approved by the U.S. Joint Chiefs of Staff in February 1957, and announced on 1 August 1957. NORAD's command headquarters was established on 12 September 1957 at Ent Air Force Base's 1954 blockhouse. In 1958, Canada and the United States agreed that the NORAD commander would always be a United States officer, with a Canadian vice commander, and Canada "agreed the command's primary purpose would be…early warning and defense for SAC's retaliatory forces." In late 1958, Canada and the United States started the Continental Air Defense Integration North (CADIN) for the Semi-Automatic Ground Environment air defense network. The initial CADIN cost sharing agreement between the two countries was signed off on 5 January 1959. Two December 1958 plans submitted by NORAD had "average yearly expenditure of around five and one half billions", including "cost of the accelerated Nike Zeus program" and three Ballistic Missile Early Warning System (BMEWS) sites.
Canada's NORAD bunker at CFB North Bay with a SAGE AN/FSQ-7 Combat Direction Central computer was constructed from 1959 to 1963, and each of the USAF's eight smaller AN/FSQ-8 Combat Control Central systems provided NORAD with data and could command the entire United States air defense. The RCAF's 1950 "ground observer system, the Long Range Air Raid Warning System", was discontinued and on 31 January 1959, the United States Ground Observer Corps was deactivated. The Cheyenne Mountain nuclear bunker's planned mission was expanded in August 1960 to "a hardened center from which CINCNORAD would supervise and direct operations "against space attack" as well as air attack" The Secretary of Defense assigned on 7 October 1960, "operational command of all space surveillance to Continental Air Defense Command (CONAD) and operational control to North American Air Defense Command (NORAD)".