In the hockey game, the teams playing are the Los Angeles Kings and the Toronto Maple Leafs. You can notice the real logos when the camera is away from the action. When it gets closer, though (probably because of copyrights), the maple leaf is turned into a spades (from cards) with only "Toronto" written and the Kings' word and crown in the logo become just an "LA" with a slightly different shape.
The building that explodes in the beginning of the film (due to Mel Gibson messing with the bomb) was the old city hall in downtown Orlando, Florida, where the scene was shot. In reality, only half the building collapsed from the explosion.