Zero?
WOW!!!
See my original remark to you... This statement shows you know nothing about flying any type of aircraft, military or civilian...
Well i allready said that i know nothing about flying a plane!
But again “sorry” that i won´t admit that flying a B-2 from north america to europe is more dangerous than flying a civillian boeing.
It´s the same!!! If your engines don´t fail and the pilot doesn´t deside to crash it into the ocean NOTHING will happen!
Because of the simple fact that NO ONE will attack you!