The Beeb has reported that the United Arab Emirates caught the North Korea sending a boat full of weapons to Iran. The ship claimed to simply be carrying "machine parts" but included machines such as rocket propelled grenades (a machine, sure, but not what one usually imagines when you hear the phrase machine parts).
This follows on from an aborted attempt to ship arms to Myanmar earlier this year (No one saw the arms in that case, but if it was the peaceful goods the two countries claimed it was, why turn back to avoid an inspection? If America had forced its way onto a ship and found nothing it would have been a big PR win).
I'm also rather glad that this ship didn't get to Iran given Iran's nuclear ambitions and North Korea's nuclear reality. I'm sure there was more on the boat than just the grenades that we haven't been told about.