Two Navy Battle Groups to Leave War Zone By ROBERT BURNS .c The Associated Press WASHINGTON (AP) - Two U.S. Navy aircraft carriers and the ships in their battle groups will leave the Persian Gulf this week and return to their home ports, a U.S. defense official said Monday. Their departure reflects a winding down of the air campaign, although the Pentagon is still sending more ground forces to Kuwait and Iraq. The USS Kitty Hawk will return to its base at Yokosuka, Japan, and the USS Constellation will return to San Diego, the official said, speaking on condition of...