PRESIDENT GEORGE W. BUSH SAID THURSDAY THAT THE DEATH OF AL-QAIDA LEADER ABU MUSAB AL-ZARQAWI IN IRAQ IS «A SEVERE BLOW» TO THE AL-QAIDA TERRORIST NETWOR, AP REPORTED. AND A DECISIVE VICTORY IN THE U.S.-LED CAMPAIGN AGAINST TERRORISM. «NOW ZARQAWI HAS MET HIS END, AND THIS VIOLENT MAN WILL NEVER MURDER AGAIN,» BUSH SAID IN THE ROSE GARDEN. «WE HAVE TOUGH DAYS AHEAD OF US IN IRAQ THAT WILL REQUIRE THE CONTINUING PATIENCE OF THE AMERICAN PEOPLE,» THE PRESIDENT SAID. BUSH LEARNED OF THE KILLING WEDNESDAY AFTERNOON FROM NATIONAL SECURITY ADVISER STEPHEN HADLEY, WHO HAD RECEIVED A PHONE CALL FROM BAGHDAD SHORTLY BEFORE 4 P.M. (2000GMT).