Funny you say that.. There's no evidence the shooter had any training whatsoever. The training school he applied for turned him down. One person goes crazy out of a country of over three hundred million and we're supposed to abolish our 2nd Amendment rights now? Believe me, if there were no such thing as guns, this guy would've built a suicide vest. It seems he had the smarts to do it had he no other options.
You know how many people are killed in car accidents per year in the United States?