While I'm being controversial, may I suggest that the reason US Airways Flight 808's contrail was so spectacular was because the exhaust was seeded with nanothermite?
Relax: If you feel you are lacking missile-based drama in your life, just remember that even if the ChiComs didn't pickle off an SL-2 war shot from a Jin-class SSBN in LA harbor the other day, there are still plenty of nuclear warheads pointed right at you. And the best part is that our jillion-dollar Defense Department replied "Duh?" instead of "USA808. Idjit."