An enemy, in 10 years or so, explodes a series of ElectroMagnetic Pulse (EMP) Nukes over us and Europe. I tend to doubt the absolute total wipe-out scenarios, BUT it wouldn't be pretty.
Just sayin ...
This has concerned me quite a bit for a long time, what with society's increasing reliance on electronic data storage.
I work in healthcare, and the idea of everybody in a city losing their entire medical history, and for patients in a hospital losing their ongoing care histories as well as x-rays is not a scenario that I look forward to. A few EMP detonations will bring us all down to a Medieval level pretty darned fast