Sunday night’s shooting in Las Vegas, that killed at least 59 people, was the deadliest in modern American history. But it’s just the latest of many mass killings in this country in recent years.

Here in Arizona there’s a program that trains everyday people to help the injured during such traumatic events. It’s called Stop the Bleed, and it’s a federal program that offers free training on how to pack wounds and create tourniquets. But more than that, it encourages people to step up and help others.

Dr. Sydney Vail, with Maricopa Integrated Health System, said these skills can make the difference between life and death during tragedies like this recent one in Las Vegas or last year’s mass killing at the Pulse nightclub in Orlando.

“People who were pinned down all over that night club started to help each other. Despite the fact there was still shooting, they started to help each other,” Vial said. “If we can get that into the minds of people in America, it will go a long way to helping save lives.”

Vail said he’s overseen the training of more than 1,000 people during the last year-and-a-half.