After every mass shooting in the United States, Americans and others around the world are confronted with the question of what lies behind this distinctly American horror, says Elizabeth Drew.

Computer files to create a plastic handgun almost entirely from parts made with a 3D printer have gone online, alarming gun-control advocates after it was successfully test-fired by its inventor.

US President Barack Obama wants "concrete proposals" to curb gun violence by the end of next month in the aftermath of the Newtown school massacre.

President Barack Obama has signalled his intention to bring in gun control laws in the wake of the Newtown massacre, saying he will use “whatever power” he has to prevent a repeat.