PAULA ZAHN, CNN ANCHOR: The big question at this hour: Is the U.S. planning to invade Iraq sometime next year? While White House officials are downplaying a "New York Times" report that says the U.S. is considering a major air and ground assault for next year that could include as many as 250,000 American troops. Meanwhile, Saddam Hussein celebrated his 65th birthday over the weekend with the usual well-choreographed tributes from the Iraqi people. And, in Baghdad, tens of thousands of people marched as a show of support and defiance in the face of U.S. determination to topple Hussein. Ambassador...