From Halopedia, the Halo wiki
Edmonton, AB(now), Ottawa,ON, and Chatsworth, ON
When you hear MSGT Stacker yell "I'm reading Sierra One One Seven on-sensor. Everyone form up on the Chief!" When I saw he was still around I was so happy!
*SPOILERS* But who here hasn't played Halo 4?
When Cortana 'dies', I wanted to cry, for some reason I couldn't though. Although, personally I don't think she's gone, I'm hoping she comes back in the next game!