President Obama vows this week not to stop pushing for new, tighter gun control rules in the U.S. He says the recent defeat of his proposals in Congress was "just the first round."
Meanwhile, as the gun debate rages on, the National Rifle Association's annual convention begins today in Houston and could be the largest in the organization's history. Around 80,000 people are expected to attend this weekend.
"We're stronger than we've ever been," said David Keene, the president of the NRA.
The convention is underway in the midst of the ongoing national debate over guns and the Second Amendment -- a debate fueled by the school shooting in Connecticut last year and failed gun control legislation in the Senate last month.
"Guns are not the problem," Keene said. "The people who misuse firearms, or the people who shouldn't have them, they're the problem."
Keene says mental health is the real issue.
New Hampshire Senator Kelly Ayotte agrees and believes the bipartisan proposal to expand background checks for firearms sold online and at gun shows would not prevent another shooting like what happened at Sandy Hook Elementary School.
"Ultimately mental health is an area that particularly in these mass violent situations we should, I think, be able to come to some improvements on," Ayotte said.
Gilles Rousseau traveled to New Hampshire to talk with Ayotte. He came on behalf of his daughter, Lauren, a first grade teacher killed at Sandy Hook.
"I feel I have to do something... not to avenge, but to... sorry, sorry to cry right away... for my daughter; I'm doing it for my daughter," Rousseau said, trying to hold back tears. "I hope we can prevent any of this in the future."
Michelle Green is with the Houston chapter of a group called "Moms Demand Action" that formed after the Sandy Hook shooting. They say they're bipartisan and made up of gun owners and non-gun owners.
Green says their goal is what they call common sense gun laws, "So that we make sure that criminals aren't easily able to access guns, to make sure that we don't have weapons out that can cause the kind of damage like we saw at Newtown."