I'm gonna be unpopular and say that I don't think this was AI. I think there is a big gap between the plane and the hangar where the crowd is: https://www.tiktok.com/@metrotimes/video/7400723109919214878
The photo is from Detroit where reportedly there was estimated to be 15k rally goers: https://www.metrotimes.com/news/kamala-harriss-jubilant-detroit-rally-ends-in-meltdown-37006643
More pictures:
https://www.mlive.com/politics/2024/08/our-favorite-photos-from-kamala-harris-detroit-rally-with-tim-walz.html
https://cloudfront-us-east-1.images.arcpublishing.com/advancelocal/TTSCE3NVO5BL7OOQMSMFIYB7LY.JPG
https://cloudfront-us-east-1.images.arcpublishing.com/advancelocal/K4OTGHGO4ZE3BOO6TJ2WJT66SE.JPG