[steve86]

There is no practical reason why he can’t launch a nuclear armed drone from a fishing trawler and detonate it over my house.

Sure there is. Size and weight. At this stage they're huge. More concerned about a weapon hidden in a merchant vessel and detonated coming into port..

[zeestephen]

steve,

In the 1980’s we had tactical nukes in the 1 kiloton range that weighed 100 to 200 pounds.

A 10 kiloton nuke on an ICBM weighed around 1000 pounds.