The most worrisome scenario, that is very realistic, is an EMP attack.
A rogue enemy with a modest rocket and busted down cargo ship could detonate a small nuke in the upper atmosphere and fry electronics all across the
country.
No power, no telephone, no internet, no water pumping, no healthcare, no cars.
Scary.
From Bloomberg today:
London’s Verification Research, Training and Information Center calculates that 630 kilograms (1,389 pounds) of low- enriched uranium could yield 15
to 22 kilograms of weapons-grade uranium, enough for the production of a device under the supervision of an expert bomb-maker. The IAEA says Iran has
more than 1,500 kilograms of low-enriched uranium.