Other American traces.
Alert, Eureka, Resolute, Mould Bay, Isachsen, (Joint Arctic Weather Stations 1946-1950)
Iqaluit (Frobisher), Kuujuaq (Chimo), 1942
CANOL Norman Wells Project (1942)
Alaska Highway (1942)
Prince Rupert (1942) - Rupert existed prior to 1942 but the Americans connected it to Terrace and then the Alaska Highway.
NORAD
Pinetree Line
DEW Line
BMEWS Line
North Warning System
And all the airfields on Greenland, including Thule (Pituffik) (1943)
....
If it wasn't for the USAF and the HBC there would be no development north of Yonge Street.
...
Sorry, I short changed Bell, Alcoa and Standard Oil.
PPS - Might also want to reference the cultural importance of Andrew Carnegie and his Carnegie Libraries.