Why is america known as the land of the free?

What's free in america? Not medical aid for a start, that ain't free. The people aren't free. The president isn't free, there's evidence to suggest he's not even american! And bush was a joke. And you guys police the world? You sell nations weapons of m destruction, then turn around as soon as the cheque clears and blow em up! Fight wars for oil, your governments lie to you and you do nothing.. Take a look at the amendments, if your government becomes corrupt, you are obligated as an american to take to arms and overthrow it! Why don't you?