(CNN) -- The nation will have a set of recommendations to address widespread gun violence within weeks, President Obama announced Wednesday.
Vice President Joe Obama will lead an inter-agency group to come up with "concrete proposals no later than January -- proposals that I then intend to push without delay," the president said.
Speaking five days after a gunman killed 27 people, including 20 children, at a Connecticut elementary school, Obama said that "if there is even one thing that we can do" to prevent such tragedies, "we have a deep obligation, all of us, to try."
"This is not some Washington commission. This is not something where folks are going to be studying the issue for six months and publishing a report that gets read and then pushed aside. This is a team that has a very specific task to pull together real reforms right now."
No single law or set of laws can prevent gun violence, the president said.
But the complexity of the issue "can no longer be an excuse for doing nothing," he said.
The "complex" issue demands action on gun laws and work in making "access to mental health care at least as easy as access to a gun," he said.
The country also needs to tackle a "culture that all to often glorifies guns and violence," he said.
"And any actions that we must take must begin inside the home and inside our hearts."
Sen. Dianne Feinstein, D-California, has said she will introduce legislation to reinstate the assault weapons ban that expired in 2004.
White House spokesman Jay Carney said Tuesday that the president supports that effort.
Obama also wants to close "the so-called gun show loophole which allows people to buy weapons without going through the background checks that are standard when you purchase " them retail, Carney said.
U.S. Attorney General Eric Holder echoed those remarks Wednesday. "There's a range of things we need to do," he said, adding that any one measure would not be adequate.
The proposals necessary will involve people who "aren't always thought of in the law enforcmeent sphere," including the departments of Education and Health and Human Services, he said.
Newtown United, a newly formed group in the stricken town, scheduled an open meeting for Wednesday evening to discuss what it calls "sensible gun legislation."
Meanwhile, heartbreaking funerals continue. Those being buried Wednesday include several more students and a beloved teacher.
They are among those killed when gunman Adam Lanza shot his mother four times in the head before shooting his way into into Sandy Hook Elementary, opening fire on staff and students no older than 7. Lanza then killed himself.
Authorities are working to determine a motive.
So far, they have been unable to retrieve data from a computer in Lanza's home, a law enforcement official said Tuesday.
The gunman apparently smashed the computer and extensively damaged the hard drive, the official said, adding that the FBI is assisting Connecticut State Police.
Authorities have said the shooter took three of his mother's weapons -- two handguns and a Bushmaster AR-15 rifle -- to the elementary school.
There are no records of any police incident calls to the Lanza home in the past, state police said Wednesday.
Holder had no comment on what the FBI has found in the investigation.
Gun debate intensifies
The National Rifle Association commented Tuesday for the first time since the massacre, saying it was shocked and heartbroken by the tragedy. The group is planning to hold a news conference on Friday.
"Out of respect for the families, and as a matter of common decency, we have given time for mourning, prayer and a full investigation of the facts before commenting," it said. "The NRA is prepared to offer meaningful contributions to help make sure this never happens again."
While the NRA has been largely quiet, the national debate over guns is reaching a new high -- some calling for stricter control, others for more access.
"In the state of Texas, with our concealed handgun license, if you have been duly backgrounded and trained and you are a concealed handgun license carrying individual, you should be able to carry your handgun anywhere in this state," Gov. Rick Perry said Monday at a tea party event. He later added that he was referring to public property.
Meanwhile, Michigan Gov. Rick Snyder vetoed legislation that would have allowed those licensed and trained to carry concealed pistols in schools and other public places, his office said Tuesday.
Citizens across the country are also weighing in, particularly on social media.
Bill Mingin's gun lay under the floorboards of his attic for 40 years, he said in an iReport.
"I thought I needed it 'just in case,'" the New Jersey man said.
But after the Newtown massacre, he thought of selling it -- but didn't want it ending up in "the hands of a bad person."
"So I smashed it with a sledge hammer, and threw it in the river. No one will ever be hurt with