"I hate to burst your bubble, but if we can transport a stolen hotel pillow across state lines, several suitcase nukes would not be defensible unless you post a soldier every 25 feet along all borders and all other ways into the country"
Two words - "land mines". They call them IEDs in other parts of the world; it's time we use their technology on them.
No more mister nice guy.
Land mines on our side of the fence would be a great idea.