No I don't think it is needed. People who are American born will go to school in America and learn all about US history. Plus when are you going to make me take this test after college or after high school. It's not like a kid is going to take an American history test and do any good on it. This makes no sense to me. Here you where born in America let me give you a test to make sure your American enough. I shouldn't have to prove my allegiance to my country.
