president obama leaves for canada where he will spend the weekend hunkered down with other world leaders at the g-8 and g-20 summit. >> security is intense in toronto. homeland security correspondent jeanne meserve is live in toronto this morning. good morning. >> reporter: hi, jim, carom. you can get a flavor for the secure behind me and you can see the police, fencing and jersey barriers that are falling into place here in downtown toronto. thus far things have been fairly calm. there are a couple of people who have been arrested on weapons and explosives charges. then there was a 53-year-old man who caused quite the security scare in downtown toronto yesterday. a car outfitted with a makeshift roof carrier is pulled over in downtown toronto. inside the police find a loaded cross bow, pellet guns, chair saw, sledgehammer, jugs of gasoline and more. it turned out not to be a threat to the g-20 but police were more than ready to respond.