[qohen]

Not in our timeline [0]:

Although Bush stated at the time "Our mission continues" and "We have difficult work to do in Iraq," he also stated that it was the end to major combat operations in Iraq. Bush never uttered the phrase "Mission Accomplished";[2] a banner stating "Mission Accomplished" was used as a backdrop to the speech.

[0] https://en.wikipedia.org/wiki/Mission_Accomplished_speech

[sseth]

Later in the article ... "the White House later conceded that they hung the banner but still insists it had been done at the request of the crew members"

He stood in front of a banner put up by the White House saying "Mission Accomplished" and claimed victory. He did not clarify that the huge banner behind him was about the crew's mission and not Iraq. It is legitimate to say that Bush proclaimed it, and pedantic to argue he did not speak the words.