Crossword: The USA - A Historical Overview

Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.
1          2                     
                           
       3                      
                           
   4                          
                           
                           
5               6                
                           
 7      8                        
               9              
        10                     
                           
11                             
                           
                           
  12                           
                           
   13