I understand responding to terrorist threats but at what point do we become like the "Minority Report's" pre-crime unit?

Quoted: The planning was not far along, one U.S. official said, but authorities "take aspirations of that sort seriously."

Quoted: "At this time we have no indication of any imminent threat to the New York transportation system, or anywhere else in the U.S.," Richard Kolko, Washington-based FBI special agent, said in a statement to Associated Press Radio.