I spent my career as a senator and as Vice President working to pass commonsense gun laws. We can't and won't prevent every tragedy. But we know they work and have a positive impact. When we passed the assault weapons ban, mass shootings went down. When the law expired, mass shootings tripled.The idea that an 18-year-old kid can walk into a gun store and buy two assault weapons is just wrong. What in God's name do you need an assault weapon for except to kill someone? Deer aren't running through the forest with Kevlar vests on, for God's sake. It's just sick. And the gun manufacturers have spent two decades aggressively marketing assault weapons which make them the most and largest profit.For God's sake, we have to have the courage to stand up to the industry.