"FOX NEWS SUNDAY" HOST CHRIS WALLACE: On this Christmas morning, we are mindful of the thousands of young men and women in uniform who are serving around the world today. To talk about that and the war in Iraq, we welcome for his first Sunday show interview General Peter Pace, chairman of the Joint Chiefs of Staff. And, General, merry Christmas and welcome to "FOX News Sunday". JOINT CHIEFS OF STAFF CHAIRMAN, GEN. PETER PACE: Thanks very much, Chris. Merry Christmas to you. WALLACE: Thank you, sir. How hard is it for our troops to wake up in Iraq on...