Let me see your papers!

Here is a story from the nation's capitol that ought to scare you. In order to combat crime D.C. officials want to seal off entire neighborhoods and set up checkpoints where the police would check people's identification to verify that they have business being in that neighborhood. Imagine having to prove to the police that you live or work in a neighborhood and facing potential arrest if you can't produce the appropriate documentation. Is this the United States or Nazi Germany?