There was a case in the 90s I think of a Canadian weather balloon that they tried to shoot down with (fighter plane) guns and had a pretty tough time of it. Gun

There was a case in the 90s I think of a Canadian weather balloon that they tried to shoot down with (fighter plane) guns and had a pretty tough time of it. Guns at that altitude too could be an issue as you lose control authority in thin air and the gun destabilizes flight controls even more.