In an age of high-tech international cyber crime, there's something refreshingly old school about a superpower using balloons to allegedly spy on its enemies. Over the last week or so it seems that the US has scrambled F-16s at the site of any kind of inflatable flying objects in its airspace. The result is that #aliens and #UFOs are currently trending on social media as the world hypothesises over the international, or intergalactic origins of the obliterated objects.