Editorial: Of course no one law will stop every shooting. But stopping some is enough to act.

It was a normal transaction. A man went to a licensed gun store north of Atlanta, filled out paperwork, got an instant background check, paid the bill and walked out with a gun. No waiting period; no required safety or training class. And just hours later, according to authorities, that 21-year-old man used that 9mm handgun to kill eight people in a rampage that targeted Asian spas. The obvious question that emerges is “What if?”