Wouldn't the US have security to defend against these agents with bombs?
I think infiltrating few agents with bombs is much easier than bypassing THAAD with primitive faulty missiles Kim have.
U.S. border is very transparent for illegal migrants, so why secret agents can't come in?!
The U.S border was transparent during Obama's regime... Trump consider the issue of illegal migrants serious! Besides, North Koreans are not too difficult to be recognize by U.S. authorities... Whenever they land on the U.S soil the security authorities may seize them before detonating anything