I don't see secruity guards in metro town carrying 9mm. Skytrain stations are rarely guarded by any visible secruity. Only time I ever saw guards at a skytrain station was in New Westminister by the Quay. 2 guys out front standing around.
St. Louis, mall security has guns, regular secruity folks have guns, on the metrolink (skytrain) there's at least 7 cops on the busy stations, 2 with semi automatics, the rest with 9mm, then every station after that there's at least 2. All with guns.
When I first spent a weekend in Vancouver I went the whole weekend without out seeing a visible cop or a gun. I thought it was weird, walking around at night seeing no secruity force. Yet I felt somehow at ease.
Then again when i was in school we always had a cop patroling the hallways with a loaded hand gun.