Joe Biden was scheduled to be in Crystal Lake, Il today. I live about half way between O'Hare airport and Crystal Lake, IL.
I was outside this afternoon and heard this really loud propeller sound behind my house. I thought that a private plane was going to crash into my house. First I saw two military helicopters fly low over my house and at high speed. Next came four V-22 Osprey aircraft flying low. OMG!!!! They were super LOUD with their huge propellers spinning. Scared the crapolla out of me 
Very strange aircraft. It must have been Joe's aircraft entourage.
(This is not a photo of the actual aircraft)