Secrecy: Spy programs defense

WASHINGTON - The Bush administration's warrantless wiretapping program has a built-in feature the Justice Department believes may shield it from ever being challenged as unconstitutional: secrecy.
The administration has acknowledged it intercepted some U.S. telephone conversations without warrants as it hunted for terrorists.
Whose calls? The government isn't saying. And since only those who were spied on have grounds to sue, it's almost impossible to mount a successful legal challenge.

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