Following an Canado-American agreement, the CFS Mont-Apica changed vocation in 1958 to join to the air defence of North America (N.O.R.A.D.).

as broad and general as the casing air

Whistles, mirlitons, flutes, trumpets or horns, clarinets, and oboes are all played in one or more parts of the continent.

The Horsehead Nebula is a typical dark nebula, and is famous for resembling the head of a horse.