. >> reporter: officer dave ka pre toe calls his canine king the best. >> king is an explosive detectivesthe super bowl. in the skyway and outside. >> the dog can easily walk in crowds. when people approach king, they just see king being all lodgeable. they don't understand that he's smelling their bags, their purse, and the air around them. he's vigilant all the time. >> reporter: it's part of the counterterrorism unit and they keep big events moving if a bag or box needs to be checked. >> if we didn't have dogs, we'd have to stop, clear the area, have the explosives detection team examine the bag and then move on. >> reporter: king has swept for celebrities and presidents and vice presidents. he often captures the attention of people who spot him. he's so popular he has his own instagram job, but his job is as serious as it comes. >> if king misses something, people get hurt, or worse, killed. that's why so much faith has to be put into my perspective with that dog. i trust him with my life. >> that was jennifer merely reporting. >>> coming up on "cbs this morning," child development ex