"You probably can walk this parking lot and find people selling guns out of the trunk of their vehicles," Massengill told Stahl.
And that's legal. "There are no restrictions in Virginia against private sales as far as background checks. And again, that amazes me that in this day and time we would not want to know, as sellers, whom we're selling to," he said.
But imposing any restrictions on gun sales in Virginia is nearly impossible.
Consider what happened when a bill was introduced to close just the gun show loophole following the 2007 Virginia Tech massacre.
With overwhelming public support, it was sure to pass, given the outrage over the worst shooting in modern U.S. history. Thirty-two students and teachers were shot and killed by a mentally disturbed student, Seung-Hui Cho.
Lily Habtu, who was shot in the jaw and survived, says the loophole must be closed. "Convicted felons can walk into a gun show. The mentally ill can go into a gun show and purchase whatever they want," she told Stahl. "Without a background check."
"Why not make it uniform and have everybody go through the background check?" Stahl asked Philip Van Cleave.
"Well, how about making it uniform and have nobody go through the background check?" he replied. The Second Amendment doesn't say, 'You can get a gun if you go through a background check.'"
Lily Habtu and several of the Virginia Tech family members lobbied to close the gun show loophole. They created Facebook groups and YouTube clips to rally for their cause.
Omar Samaha, whose 18-year-old sister Reema was killed that day, testified before Virginia lawmakers that he went to the Richmond gun show one day, and bought a dozen weapons in an hour, including an assault rifle and something else: "A Glock that was stronger than the one used to kill my sister."
He said he never had to show any identification.
And asked if he was asked for identification, Samaha said, "I was asked but I refused."
"So what happened?" Stahl asked.
"They either sold me the gun still or they said, 'Pay me 15 more dollars and I'll go without looking at your ID," he replied.
"Here's one of the big arguments: Cho didn't get the guns from a gun show, and he did show his ID. There was a background check on him," Stahl pointed out.
"But the next Cho will go to a gun show because it's that simple. It's just like buying a candy bar. It really is," Samaha said.
But if one side thinks the lesson of the Virginia Tech massacre is that we need more gun control, the other side - the gun lobby - says it proves we need less.
Philip Van Cleave says the ban on guns on college campuses should be lifted. "If just one student 21 or older had a permit and had been armed that day - I mean the first time a police officer showed up, they didn't even fire a shot. He saw the police coming, he killed himself. It was over. The first time somebody would've been able to show him resistance, it would've stopped him. I'm convinced he would've killed himself and probably saved a whole bunch of lives at that point."
"Arming all those young people…" Stahl said.
"Wonder who's fighting in Iraq for us right now," Van Cleave replied.
"But you know, you could have a lot of them be like Cho," Stahl said.
"If they do, there will be plenty of other 21, 22, 23 and older people there to make sure that he doesn't get very far," Van Cleave argued.