**Background:** Chicago banned hand guns w/o registration, and Citizens sued because it violates the second amendment
**Holding:** Majority ruled in favor of citizens, claiming that a citizens right to keep and bear arms is a fundamental right, protected by the states
**Constitutional Principles:** 2nd amendment, 14th amendment
**Overall Claim:** The 2nd Amendment right to keep and bear arms for self-defense is applicable to the states due to the 14th amendment