Watch President Obama's speech live on CNN tonight at 8 ET, online, on TV and on the CNN App for the iPhone.
Washington (CNN) -- When President Obama steps into the Oval Office to deliver his prime-time address on Tuesday, he won't be taking a victory lap and won't utter the words "mission accomplished, a top aide says. Instead, the president will have a "change of mission" moment, where he explains the way forward in Iraq and thanks U.S. troops for their sacrifice.
The address, which is expected to last between 15 and 20 minutes, will mark what the White House is calling an important "milestone" and a campaign promise accomplished.