| | Early-Warning Radar (Site not responding. Last check: 2007-10-19) |
 | | LAURENT's government accepted the advice in June 1954 and proceeded with this all-Canadian Mid-Canada Line project because technology was available in Canada, the line was cheaper than an arctic chain, and the plan avoided the troublesome issue of American presence on Canadian soil. |
 | | Intercontinental and submarine-launched missiles, against which all 3 early-warning lines were useless, began to replace the manned bomber as the main Soviet threat in the early 1960s and a Ballistic Missile Early Warning System (BMEWS) was constructed in Alaska and Greenland. |
 | | Additional detection capabilities would be provided by radar warning and control aircraft (AWACS), and long-range over-the-horizon radars on the eastern and western perimeters of N America. |
| www.canadianencyclopedia.ca /index.cfm?PgNm=TCE&Params=A1ARTA0002485 (819 words) |