>>1213884 (last bread)
They don't need anything like that.
All they need to do is the following.
Container ship. (You can buy one for cheaper than a Bugatti Veyron. Almost all are flagged to dodgy countries)
Cruise missiles in containers.(Iran has the Russian version)
Fire them off just outside our territorial waters in international waters.(No muss, no fuss)
Very simple guidance-stay at 500 feet above surface until it reaches a set latitude/longitude then detonate. They'd be flying over water so no obstacles until close.
Could take out Boston, NYC, Philly, Washington D.C., Norfolk, Charleston, Miami, New Orleans, Houston, San Diego, Los Angeles, San Francisco, Portland and Seattle.
That much infrastructure taken out=collapse of the country.
Iran has been practicing doing this very thing since 2006.