At the end he tells a story of two fallen heroes and stumbles over the words he's reading several times. Then, it looks like he just sort of walks away.
Being there, what did you see?
Yes yes, at the 12 minute mark a huge change. He definitely became bored and didn’t even try to fake sincerity.
I urge everyone to view the speech and see for yourself the change which occurs around 12 minutes in!