Flanked by victims of gun violence, President Barack Obama on Thursday renewed his push for new tougher federal gun control laws.
He made his appeal to Congress during a White House news conference, also joined by Vice President Joe Biden and law enforcement officials.
The president says 90 percent of Americans support tighter gun restrictions, and that it's important for them to mobilize to make their voices heard.
"That's what it's going to take to make this country safer. It's going to take moms and dads and hunters and sportsmen and clergy and local officials like the mayors who are here today, standing up and saying this time really is different. That we're not going to sit back and wait for the next Newtown or the next Blacksburg or the next innocent beautiful child is gunned down on a playground," Obama said.
Senate Majority Leader Harry Reid has said a gun control measure likely to be debated next month will include tougher laws and penalties for gun trafficking and would close background check loopholes.
The bill would not include an assault rifle ban due to a lack of support.
Republican Senator Rand Paul is one of the more vocal opponents of the legislation.
He's warning Democrats that it will have significant opposition.
On Thursday, Mayor Michael Bloomberg's advocacy group for gun control held a so-called Day of Action.
Officials with Mayors Against Illegal Guns say more than 100 anti-gun events took place around the country.
The group also debuted a new ad that features family members of the Newtown victims talking about the massacre.
This latest push for gun control comes as search warrant details have surfaced in the Newtown school shooting investigation.
The attorney leading the investigation into last year's elementary school shooting in Connecticut says gunman Adam Lanza killed the victims and took his own life within five minutes of shooting his way into the building.
The state's attorney says all of the 26 victims inside the school were killed with a Bushmaster .223-caliber rifle and Lanza killed himself with a handgun.
The warrants reveal investigators recovered articles on other shootings at Lanza's house along with a holiday card from his mother with a check made out to him for the purchase of a gun.
They also found books on living with autism and Asperger's syndrome, and an NRA guide to pistol shooting.
Also found at the home he lived in with his mother was an arsenal of more than a dozen knives, swords and guns.