Many people in the U.S. are debating the 2nd Amendment and what it means for gun control. How much do you know about its origins? | HISTORY

The Second Amendment casts a long shadow across gun discussions in the U.S. Gun rights advocates warn that those in favor of gun control want to take away the rights written into the Constitution. But actually changing the Constitution is purposefully a cumbersome process, NPR's senior political editor and correspondent explains. | NPR