That’s a bit emphatic, surely? If you can make a B2 bomber stealthy then perhaps you can do the same with a balloon - the bags are thin polythene [1] and I ass

That’s a bit emphatic, surely? If you can make a B2 bomber stealthy then perhaps you can do the same with a balloon - the bags are thin polythene [1] and I assume you could combine geometry and radar absorbing material to make a payload disappear. If it were that obviously visible why wasn’t it intercepted when it crossed into America’s air defence identification zone? [1] https://www.nasa.gov/scientific-balloons/types-of-balloons https://www.nasa.gov/scientific-balloons/types-of-balloons