Organizers insisted today that a new French aid flight to Baghdad will go ahead as planned this week in defiance of U.N. sanctions and despite pressures from the highest levels to cancel the operation. The leader of the charity, Children of the World, which is one of the project’s sponsors, said the aircraft will leave France for Baghdad tomorrow, a week after a first-aid flight to the Iraqi capital drew U.S. protests. Among those expected to be on the flight are two former U.N. officials: Hans von Sponeck and Denis Halliday.