Which is why I use the words like trained and law abiding. A good or law abiding citizens is not going to commit a crime or kill someone, and a bad person or criminal is not going to obey the laws any way. What you and other anti-gun people are asking is a preemptive strike against gun violence altogether. It is already illegal for a convicted felon to purchase or own a firearm in the U.S. And more background checks is not going to find out if a person is going to commit a crime in the future. This is not Minority Report, we cannot arrest someone before they commit a crime. And every police officer I have ever talked to encourages citizens to buy firearms to defend themselves. As one of the police chiefs I talked to said, "Police show up after a crime is committed, not before." And as for your argument about having weapons that did not exist, come on you are going to have to do better than that. We invent and improve technology all the time, from vehicles to phones etc. But no, you are right the founding fathers and the second amendment do not allow for weapon innovation...