Shoppers invade Mall of America on the busiest shopping day of the year.

Thousands of Minnesota Vikings fans come to the mall to meet former players, including Carl Eller and Scott Studwell.

Sarah Palin visits the Mall of America, and security must deal with passionate followers, protesters, a bounty hunter and a bomb threat.

"Twilight" fans fill the mall for the "New Moon" premiere; mall cops break up a fight involving a man with a knife; an intoxicated man tries to get behind the wheel.

The mall's no-pets rule is overturned for a charity dog walk; a trash-can fire threatens mall safety; a customer believes he's been discriminated against.

A bomb scare occurs in the mall when Minnesota governor Tim Pawlenty makes an appearance. Also: thousands of foodies visit the mall to meet a celebrity chef.

A winter storm threatens to drop 24 inches of snow, forcing security to consider closing early for the first time. Meanwhile, mall cops deal with a number of weather-related accidents, along with a fire hazard that closes the food court for hours.

The roster for the U.S. women's Olympic hockey team is announced at the Mall of America. Also: mall cops help lost children find their parents; search for missing cars; and break up a brawl.

A large group of streakers show up at Mall of America, hoping to run through with no pants. But Doug Reynolds, director of security, is ready for them.

The mall has a lockdown drill, which doesn't go so well. Officers also help a diabetic who falls, deal with an intoxicated teen, and care for a child whose mother was arrested for shoplifting.

Mall of America's undercover unit, RAM, struggles to train its newest member: a bomb-sniffing dog named Bear. When a serious threat shuts down the airport less than three miles away, the RAM unit goes on high alert to avert possible terrorist activity.

With the Rotunda filled to capacity, Mall Cops spring into action when a children's book author falls on stage. Meanwhile, officers help a lost boy who does not speak English, apprehend a young shoplifter, and help a man who has suffered a stroke.