Iraq Iraqi leaders prepared for a conference to try to break the deadlock on a draft constitution amid unabated violence that left 10 people dead, a day after 14 US marines were killed by rebels. Britain Thousands of police mounted a huge operation to protect London, exactly four weeks after suicide bombers brought carnage to the city, while a suspect in a bungled second wave of attacks appeared in court. US-Britain Al-Qaeda leader Osama bin Laden's right-hand man Ayman al-Zawahiri warned Britain and the United States of more horror and destruction in a new videotape shown on Al-Jazeera television. US NASA experts were mulling whether the crew of Discovery will need to risk another space walk to make final repairs to the shuttle to ensure its safe return to Earth next week. North Korea North Korean nuclear talks floundered with the Stalinist state failing to deliver an expected decision on whether it is ready to abandon its atomic weapons programs. Canada Investigators said a lightning storm played a key role in the crash landing of an Air France jet at Toronto airport while the crew is praised for helping passengers survive the fiery ordeal. Mideast Thousands of Palestinians rallied in Gaza to celebrate the imminent departure of Jewish settlers from the territory as Israel sought to cement its presence in the occupied West Bank. Sudan The body of former Sudanese rebel leader John Garang began the journey to its final resting place after his death in an air crash triggered days of deadly riots and threatened a landmark peace deal. African Union-UN Nigerian President Olusegun Obasanjo urged divided African leaders to forge a consensus on United Nations reform to keep the continent from losing out if the UN Security Council is expanded. Britain-North Ireland The leader of Northern Ireland's main Protestant party refused to discuss a power-sharing government with his Roman Catholic counterparts until he was satisfied the Irish Republican Army had completely renounced violence.