Tiny mistakes that led to huge catastrophes

On losing a B-2:

... it's just a $1.4 billion aircraft, not like they could have ever guessed it would be flown in a place where there was humidity. We always go to war with dry countries...
When another bomber pulled into Guam earlier this year, on presumably an equally humid day, a different maintenance crew left the wet sensors the way they were. As it turns out, those air sensors feed data to the Stealth Bomber's flight control system. Important data. The kind that keeps Stealth Bombers in the air...
The malfunctioning sensors resulted in a premature take off, a 30-degree nose-towards-the-sky ascent, and...