Part of an experiment in Brazil in 1957 to increase honey production, a swarm escaped, and began heading North, while interbreeding with Western honeybees along the way, passing on a characteristic aggressive trait, which can make a swarm life threatening. There is both the threat due to their aggressive nature ( Pre-Emptive Strike?), and the threat to the entire beekeeping industry.
Beekeepers in Full Body Armour, inside an industrial greenhouse, with robotic collection, and a hermetic seal. Unless we can find a way to make honey without bees.

It is really frightening what man does when he attempts to "improve" on Mother Earth. Kudzu in the American south has been devastating, and similar examples abound.