A mystery to people from other countries, America's gun culture is as old as the Revolution, enshrined in the Bill of Rights, perpetuated by the Civil War and mythologized as "how the West was won." But, since the massacre at Sandy Hook Elementary, even gun owners are joining the movement for gun regulation — at the same time supporting the 2nd Amendment. The NRA is still warning about a plot for gun confiscation, but it's hunkering down for a major battle in Washington. We hear from gun owners on both sides and go to the inner cities, where gun violence is epidemic despite tough gun restrictions. If city kids can get around local controls, is that an argument for cracking down at the state and federal level?