When we have freedom, we have the ability to make our own decisions. I chose to wake up this morning and make some extra cash by getting on Freelancer.com. Others choose to go to a physical job or school, and some people make poor decisions like doing drugs and committing crimes. But they can, because they have the freedom to do so, until of course that freedom is taken away by law enforcement.
In America, we are born and raised with this idea of freedom instilled in us. Some Americans recognize that freedom, and will do anything to protect it, including: protests, marches, or even joining the military. Other Americans are not truly thankful for the freedoms that they have, because they have never been in a situation where a choice was taken from them. Freedom may not be a "choice," but it is being confronted with "choices" and making a decision. Without choices, there is no freedom.