BILL'S AIDE PROBED IN FILE SWIPE By JOHN SOLOMON -------------------------------------------------------------------------------- July 20, 2004 -- WASHINGTON — Former National Security Adviser Sandy Berger is the focus of a criminal probe after he removed highly classified terrorism documents from a secure reading room while preparing for the Sept. 11 commission hearings. The ex-Clinton administration official's home and office were searched earlier this year by FBI agents armed with warrants after he voluntarily returned documents to the National Archives. But some drafts of a sensitive, after-action report critical of the Clinton administration's handling of al Qaeda terror threats during the December 1999 millennium...