Matthew Kolakowski was shopping with his daughter at a Michigan Walmart when he heard screams and saw a man with a knife.

The actions some shoppers drew praise from authorities. Overnight, the strangers became online celebrities for their heroics ...

The former Marine who used a shopping cart as a weapon and the man who took cellphone video of bystanders helping to ...

Nearly a dozen people were injured in the attack before citizens -- including Derrick Perry, who was armed with a gun -- ...

Derrick Perry, a United States Marine veteran, confronted a knife-wielding man in the parking lot of the Traverse City Walmart.

Derrick Perry says he's no hero for helping subdue Bradford James Gille, who faces terrorism and assault charges for ...

"The only thing that separated me from the other gentleman that had stepped in as well was what I was carrying in my hands," ...

Authorities in Michigan say a man entered a Walmart in Traverse City on Saturday afternoon with a folding knife and stabbed 11 people.

A Walmart employee was helping a customer check out when she heard a warning that someone in the store had a knife.

The mother of one of the 11 people stabbed at a Traverse City-area Walmart said she grieves for not only the victims, but for the man who stabbed her son and the others.