Many of the images are murky black-and-white photos or video clips in which the purported flying object is unclear, but others show a more defined object.

Donald Trump’s return to Beijing this week takes place in a much different world. But he remains hungry for a trade deal, and China’s military build-up and the future of Taiwan still loom large.

A former police officer has emerged as a central figure in the mystery surrounding the ex-financier’s final days in a New York jail.