The Jerusalem Post December 3, 2002, Tuesday SECTION: NEWS; Pg. 2 LENGTH: 600 words HEADLINE: Halevy: Mega-terror has changed everything BYLINE: Greer Fay Cashman, News Agencies Contributed To This Report. BODY: Mega-terrorism and global jihad have changed the rules of the game in the balance of national and international security, said Ephraim Halevy, immediate past head of the Mossad and current chief of the National Security Council, at Monday's opening of the third annual Herzliya Conference. "A successful terrorist mega-attack would instantly change a long series of rules of conduct and behavior," he said. Last Thursday's attack on an Arkia...