I walk through our warehouse and study the artifacts the same way others people-watch on the subway. There is character in things. They tell a rich story. My favourite is the Theratron Junior built in 1956. Canada made 140 of these radiation therapy devices and sold them all over the world for $25,000 apiece. We were so proud of them we put the Theratron in the Canadian exhibit at the 1962 World’s Fair in Seattle. The German exhibit had strudel. The French exhibit had art from the Louvre. Canada had the Theratron and a Black Brant rocket and an Alouette satellite. We were fresh and modern and confident, and a scientific powerhouse. This is how we showed ourselves to the postwar world.