When he read the Ottawa Citizen's editorial about the end of an era. The end of the Kodachrome era.
The era ended when 2010 ended at Dwayne's Photo Service in Wichita, Kansas, the last place extant that was developing the film.
Kodak's Kodachrome, widely viewed as the world's first color film, was created in 1935. If you were in my world back in the day it was the film of record for your First Communion, Bat Mitzvah, Weddings et. al.