1.  Paragraph #13 states: "Arizona is the nation's most heavily traveled corridor for illegal immigration and smuggling."  Why has the Arizona state government passed a law on illegal immigration? Include Arizona's attorney Paul Clement's arguments.

2.  Why has the Obama administration sued Arizona over its illegal immigration law?  Include the federal government's Solicitor General Donald Verrilli's arguments.

3.  What is the main issue of the federal government's challenge to Arizona's law?

4.  List the other states that have passed similar legislation.

5.  How did the justices respond to the federal government's arguments during oral arguments on Wednesday?