A "destabilizing foreign military capability" Scenario

One possibility that would create a horrendous national security nightmare

“An electromagnetic pulse (EMP) attack is a threat few Americans are familiar with, yet one which could easily destroy their lives. What would you do if your electricity suddenly went out and didn't come back on for months or even years? How long would you last with the food in your pantry, the bottled water you have shelved, and your net worth reduced …