let s go out front. i m erin burnett. out front tonight, the u.s. pullout of iraq and its final hours. in 19 days all troops will be out. iraqi prime minister nuri al maliki traveled to washington to meet president obama today. this is a historic moment. a war is ending. a new day is upon us. and let us never forget those who gave us this chance. the untold number of iraqis who have given their lives. more than 1 million americans, military and civilian, who have served in iraq. nearly 4,500 fallen americans who gave their last full measure of devotion. we have a moral obligation to all of them to build a future worthy of their sacrifice. the two leaders laid a wreath at arlington national cemetery for the close to 4,500 troops who did lose their lives in iraq. but with 16,000 americans slated to remain, none of whom will be military, some are worried that america has made the wrong call in pulling troops out. one of those concerned is former vice president dick chene