listening to the Pentagon speaker, Pat Ryder - no one has asked him what POWERS the balloon - maybe that’s why they can’t shoot it down.
He affirms that it is “manuverable”
Just counted a total of 8 “signal sniffers” (AWAC, E4B, Rivet135) in the air across the US and 2 E6 Doomsday flying command posts up in middle-America.
Maybe a solar array powers the balloon.
So is any fighter with 20mm cannons, no definable reason not to shoot it down.