Will China invade Taiwan? If so, when and what signs should we look for that will show it is imminent? How exactly could Beijing seize the island? And what would the US do in response? These questions have been at the core of Indo-Pacific security concerns for decades, but in recent years, the threat has become more tangible - and the questions more urgent. In the final episode of this three-part series, Venetia Rainey looks at different analyses of whether Beijing is getting ready to invade