Honestly, I don't think you can either. Again, just tired of hearing about kids getting killed by some head case. I'm tired of my girls talking about "what if" during dinner.
Raising the age to 21 probably wouldn't do much anyway........
Trying to explain this to our 11yo daughter too - she doesn't understand, but knows something is wrong. We hate hearing these stories, and I really hope we find a way to get his under control. Relatively speaking, this is a new type of event historically. This wasn't happening regularly just 30 years ago. We need to identify the root causes and do what we can to fix it - and that it going to take a collective effort on the part of all Americans - and probably won't require politicians to arrive at the solution.