The CN Tower marked its 40th anniversary Sunday as living memory flooded back into millions of minds about the momentous days which saw it built. For those born after the tower’s completion, the CN Tower may seem like just another local landmark, viewed the same way the Eiffel Tower (1889) was viewed by the millennial generation of the last century. The video is a blast of 1970s bravado that brings back the triumph of this engineering challenge.