The United States faces dangers and sacrifices in its fight against global terrorism, and it must press ahead with its vision for peace in the Middle East, President Bush said Saturday. Secretary of State Colin Powell, who returned from the Middle East this week, made progress toward bringing embattled Israelis and Palestinians together, Bush said in his weekly radio address. Powell's meetings were "productive and intensive," he said. However, before the two groups can live side by side in security and peace, "the Palestinian Authority must act on its words of condemnation against terror. Israel must continue its withdrawals," the Republican president said. "All Arab nations must confront terror in their own region. All parties must stop funding or inciting terror, and must state clearly that a murderer is not a martyr; he or she is just a murderer," Bush said.