"I just went as hard as I could and just got him on his ankles with the grocery cart from behind," said the disabled veteran who, along with other shoppers, managed to disarm and restrain the man with the knife until police arrived.

One of the men who authorities say helped take down a suspect who stabbed eleven people at a Walmart told NBC News about how he sprung into action. Marine veteran Matthew Kolakowski says he took off running after the suspect and rammed him with a grocery cart to prevent him from hurting more people.