President Obama has said there will be "shame" on himself and the American people if pledges to bring in tougher gun safety laws after the Newtown school massacre go unfulfilled.
More than 3,000 gun deaths have occurred in the US since Adam Lanza shot dead 26 children and staff at Sandy Hook Elementary School in Connecticut in December.
More shocking details of the speed of the attack and the arsenal of weapons Lanza owned have been released today.
But, as ITV News Correspondent Geraint Vincent reports from Washington, DC, Mr Obama still faces great difficulty in translating anger at the massacre into legislation aimed at curbing the public's right to bear the most powerful of arms.
More top news
Ramsay Street, the set of long-running Australian soap Neighbours, is to be transformed into a hotel for fans.
The average Brit spends almost ten years of their lives in front of the television, research has suggested.
Five different recipes of prostate cancer have been identified, with major implications for the way the disease is treated.