Asking questions is an essential part of police investigation. In the ordinary sense a police officer is free to ask a person for identification without implicating the Fourth Amendment.
“It goes back to a style of moviemaking I remember seeing as a child, in movies like The Man With The Golden Arm, which I think was shot all on a sound stage.”
“The world awaits Beijing's hosting of the 2008 Olympics, an occasion which will bring into the global spotlight the dramatic advances China is making in enhancing the quality of life for its people.”