School shootings have taken a terrible human toll. They have also been a boon to the business of security technology.

Over the summer, Washington Post reporter John Woodrow Cox saw an array of items on display at an expo in Orlando, Fla. He and fellow reporter Steven Rich went on to investigate whether any of the technology being promoted and sold really helps save lives.

One minute, Seamus Hughes was reading the book Dragons Love Tacos to his son. A few minutes later, after putting him to bed, Hughes was back on his computer, stumbling on what could be one of the most closely guarded secrets within the U.S. government: that the Justice Department may be preparing criminal charges against WikiLeaks founder Julian Assange.

On the morning of his 23rd birthday, Leonel Salas is just getting off the fireline after battling the Woolsey fire all night in Southern California.

"[We] can't get any rest while we're on the lines," he says.

He's exhausted after working for 24 hours, but relieved to be at the base camp in Camarillo where there are hot meals, sleeping pods and mobile showers.

Salas and his crew have been on the job for over a week now. When he got the call to head out to the fire he didn't even have the chance to say goodbye to his parents.

Updated at 10:00 p.m. ET

President Trump visited fire-ravaged areas of California on Saturday, meeting with people affected by the wildfires. At least 76 people were killed in the Camp Fire in Northern California, and nearly 1,300 people have been reported missing, making it the most destructive and deadly wildfire in California state history.