A diesel-electric submarine based on 50+ year old technology (i.e., small and quiet) sneaks up on America's high tech fleet in the middle of a war game. Seriou

A diesel-electric submarine based on 50+ year old technology (i.e., small and quiet) sneaks up on America's high tech fleet in the middle of a war game. Serious geopolitical change? I'm sorry, no. (Please don't sensationalize such headlines ala reddit.) Problems in the high tech detection systems of the American military? Yes, that's the ticket.