Because of the 2nd Amendment to the United States Constitution, every American citizen has the right to "keep and bear arms". This has been taken to mean that most people can own guns. Originally, it was thought that the federal government could not ban guns, but states and cities could. However, in 2010, the Supreme Court said that states and cities could not ban handguns. Although banning all guns is not allowed anymore, states and cities can still stop the sale and use of certain kinds of guns, such as guns that fire many bullets very quickly. They can also say that certain people, such as criminals, cannot own guns. There is a strong "gun lobby" in the United States. It is led by the National Rifle Association, which supports the right to own guns. They want it to be fairly easy to get a gun. Other groups, such as the Brady Campaign, want guns to be hard to get because they believe that guns cause violence, injury and death. Some states have very strict gun laws, but others, such as Arizona, Utah, and Mississippi, do not.