A self destruct doesn't need to blow up the entire ballon and airframe. It could just fry the key electronics in place and turn them into slag. You'd also ima

A self destruct doesn't need to blow up the entire ballon and airframe. It could just fry the key electronics in place and turn them into slag. You'd also imagine that there'd be some sort of dead mans switch so if remote access was jammed or if somehow the US was able to capture it intact, that whatever destruct mechanism would trigger.