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Colors, the secretary joined leaders in honoring our service members while being candid about the road ahead for the nation. chief foreign correspondent richardengel, has covered the war from the start and join us live from baghdad. richard, a solemn days in many ways, with the secretary of defense saying to the troops, your nation is deeply indebted to you. all of us, of course, honor their service, but this departure leaves many questions unanswered, doesn't it? not least, remaining diplomatic personnel and the fragile peace between iraq's sectarian groups. >> reporter: well, starting off wi...