Essentially China runs America. The balloon proved the final pieces.
*Own and control President.
*Own and control Military Generals and other assets within the defense system
*Own land within the country
*Open ports with access to country at anytime
*Secret" Chinese Police Stations scattered throughout the country.
The FDA "doesn't know" how much we depend on China for medicine
https://www.fiercepharma.com/manufacturing/how-much-does-u-s-rely-china-for-drugs-fda-simply-doesn-t-know
Not only does China supply a tremendous amount of our consumer and commercial goods, medical supplies, pharmaceuticals, and vital raw materials, but it also controls a huge share of the world's shipping fleet and commercial ship building capabilities. China owns roughly $1.08 trillion worth of U.S. debt.
Now why would China need to fly a balloon over the country when they have this much control on US already?