The way that British and Americans view the Alexander Litvinenko assassination is a good example of how this would be perceived in the target countries. In fact, Putin had the Duma create a law that allows him to assassinate 'enemies of the state' outside of Russian borders, and it is among the many reasons that Europe and former Soviet states (besides 'more Russian than Russia' Belarus) are all upset at Russia. BTW, the per unit cost of a Tomahawk cruse missile is $1,4000,000. From my perspective you better be damn sure you actually have something to really hit if you use one. Launching a missile at a camp with a bunch of spread out tents where each tent with one or two terrorists and you maybe kill 5 terrorists with a cruise missile would be absurd. As a waste of resources and as a provocation its negatives far outweigh any positives.
I think that is an option, but I think it shouldn't be the first option. Initially they need to present the evidence to nations all over the world including the nation housing the training camp. Let them act first to dismantle the camp and expel the terrorists. If the nation is resistant then present their refusal along with the evidence to other nations to put pressure on that nation from all over the world. The cruise missile would be one of the last options.
Weapons control? We need Missile control! I think every Missile should cost $1.4m dollars. Because if a missile cost $1.4m dollars, we wouldn't have any innocent bystanders.
Regarding North Korea, they have been found to most likely be involved with methamphetamine production and sale (most likely because it may just be top level government officials). In the past they also have often sold arms to rebel groups and other 'nongovernmental' bodies. Apart from the propaganda, if any country in the world were to do such a thing, my money would be on North Korea far before any of the other demonized countries like Iran or pre-invasion Iraq. I don't think they would sell nuclear weapons (simply because they don't have enough) but if the hard currency was sufficent and they thought they could get away with it, I think North Korea would sell bio or chem weapons. Some of the '-stans' - the Central Asian former Soviet states - are apparently a better place to pick stuff up (an American bought two fully functional MiG 29's from an airport in Kyrgyzstan for a couple of hundred thousand dollars!) but I think they are too inept to keep such things functional for this long.
Look I am all for hit squads, if a government is destabalizing the world, take out their head of state. Let's start with the Mullahs in Iran ! DD
you start launching long range missles into populated areas and you kill so many innocent people, which will increase your enemies in the long run and instead of having a camp in a country that is preaching hate to the U.S. it becomes the whole country preaching hate to the U.S. Our recent enemies are people we created. (sadam, Usama)