I still get goosebumps! They loop (or at least they used to) a recording of President Reagan’s speech saying, “Mr. Gobachav, tear down this wall!”
That line about tearing down the wall was all Reagan. He added it to the original speech. All the policy people review all presidential speeches to make sure they fit with U.S. policy.
That line kept getting deleted. He would add it back in every time. The speeches would go back and forth through all the various departments that might be affected by a speech - so a dozen times maybe.
On the way to the wall, in the limo, Reagan found the page and added it back in!