There's a new player in the gun debate -- and it could make all the difference. It comes in the form of teenagers who are hurt and outraged over the spate of school shootings, including last week's attack on a high school in Parkland, Florida. They want laws to ban assault weapons, and keep guns out of the hands of people who shouldn't have it. Nothing much changes with gun laws. But this group deserves some respect. Why? Because they don't play politics, as the ultimate free agents. That gives them power -- lots of it.