TUNIS, Tunisia -- Libyan leader Moammar Gadhafi threatened to pull his country out of the Arab League on Saturday after withdrawing from the opening session of the annual Arab summit. Speaking at a news conference shortly after he walked out of the opening session of the summit in Tunis, Gadhafi did not say flatly that he was pulling out, a threat Libya has made before, accusing the 22-member organization of being ineffective.