US President Barack Obama has said action must be taken for new gun safety laws in the wake of the Newtown massacre, saying "shame on us if we've forgotten" the pledge made for the school victims.
"We need everybody to remember what we felt less than 100 days ago and make sure what we said wasn't just a bunch of platitudes," Mr Obama said at the White House.
"The entire country was shocked and pledged we'd do something about it and this time it'd be different," he said.
The president said the gun lobby contains "powerful voices" whose "assumption is that people will just forget about" the demand for tighter laws made after the December killings.
But Mr Obama said: "Nothing is more powerful than millions of people calling for change."
More top news
Rio Ferdinand has hit back at Kick It Out's criticism of him by labelling the anti-racism organisation as 'pointless'
When Alison Powell's four-year-old Labrador Missy would not stop sniffing and pawing her, she knew it was more than simple canine affection.
Police have confirmed that six arrests were made as part of their operation for the Arsenal v Galatasaray Champions League match