I agree, it's a possibility. Was warned by a physicist 1 week ago this may start happening, when he read my pilots-passing-out article. His exact quote: "I would be more worried about planes falling apart from neutron bombardment". Wigner effect of discomposition of metals.

Then I found this a few days ago:
At around 10:34 a.m. March 4, an F-15C assigned to Kadena Air Base made an emergency landing at the base. The windshield of the cockpit had come off the aircraft. It is not known why the windshield fell away during flight training. The aircraft took off from the base at around 9:54 a.m. A spokesperson from the Kadena Air Base said an investigation was being undertaken. At around 10:30 a.m., emergency vehicles were waiting near the runway, and an F-15C landed at the north runway without its windshield, witnesses said. After the airplane landed, mechanic crews checked its fuselage. At around 11:00, the aircraft was towed into the maintenance hangar. **According to the Okinawa Prefectural Government, there has been three accidents involving a windshield falling away from F-15C fighters and 12 cases of parts of the airplane falling away.** The Okinawa Prefectural Government and the relevant municipalities, including Kadena Town Office, will protest against the Okinawa Defense Bureau and the U.S. military authority. They will also ask that the U.S. military should take extra measures to prevent accidents.

[link to hisz.rsoe.hu]