North Warning System is a long-range radar network built to provide the United States and Canada with warning of an air attack from the north. It was completed in 1994. The system extends from northwest Alaska across northern Canada and down the coast of Labrador. It consists of 54 radar stations. NORAD, a U.S.-Canadian military alliance, controls the North Warning System (see NORAD ).
In 1985, the United States and Canada agreed to improve surveillance by replacing the DEW (_D_istant _E_arly _W_arning) line’s aging radars and building additional radars (see DEW line ). The improved system was renamed the North Warning System. The North Warning System replaced the DEW line after that system was deactivated in 1993.
