One other thing
Back in 1964, a B-52H like the one pictured below lost about 85% of the vertical stabilizer and rudder due to clear air turbulence. The pilot (a highly experienced test pilot) managed to keep the plane under control and land safely about 4 hours later. He did it by lowering the landing gear and using differential thrust to keep the plane under control.
Many other crews weren't so lucky. Several other B-52s lost their tails in the early 1960s due to a structural problem. Most of them crashed, although some of the crews did manage to eject.
