> because if Iran gets to keep their approx 1000lbs all they have to do is make a simple gun-type device and sail it into New York City

You need to stop watching too many movies and/or conspiracy videos. Given how security has gotten tighter it is impossible to "sail it into New York City". The budgets for nearly every 3 letter agency is up. The only reason to make up such absurd points is to get more funding for the agencies or just continuing the war.