Prime Minister Ariel Sharon said Monday the Israeli army would continue its massive military crackdown on Palestinians "until the mission is completed." He again blamed Palestinian leader Yasser Arafat for failing to control attacks on Israelis. Sharon, speaking to the Knesset, refused U.S. calls for a halt to the action in which some 200 Palestinians have been killed. He said the Israeli Defense Forces would stop the operation once it had "dismantled Arafat's terror infrastructure." Israel opened the offensive in response to a series of suicide bombings, including a blast that killed 27 Israelis at a Passover Seder. The prime...