Now the Chinese ‘spy balloon’ is down, the question is: what was it for?

Was Beijing trying to sabotage talks with the US, monitor the speed of its military response, or just test Joe Biden's mettle?

Now the Chinese balloon has been brought down in a puff of smoke and debris by a US air-launched missile, after perplexing Washington with its three-day odyssey over the continental United States, the question is: what was it all for?

Once the balloon was spotted, Beijing claimed it was a weather observation airship that had been blown off course, drawing a snort of derision from the Pentagon, which said the balloon was able to manoeuvre and had made some deliberate turns, bringing it at one point over Montana, home of some of the US arsenal of silo-based nuclear intercontinental ballistic missiles (ICBMs).