* Headlines for Tuesday, April 23rd, 2002 * In Ramallah, More International Activists Slip Into Yasser Arafat's Compound; in Bethlehem, Talks Between the Israeli Army and Palestinian Negotiators; Microsoft Thanks Israeli Tanks * Ariel Sharon Plans to Annex Half of the West Bank: A Debate On the History of the Israeli-Palestinian Conflict and Zionism * "Clear Skies," Or No Skies? The Bush Administration and Earth Day