POTUS mentions wheels, then computers and the wall.
When he mentions about the computers, he says "12 days later, it's obsolete".
12 days later is Sept 29th.
Notable
Sourdough starter may be code word for "napalm", a Molotov cocktail
https://www.nbcnews.com/tech/social-media/federal-agents-monitored-facebook-arrest-protesters-inciting-riots-court-records-n1231531