I see that TAP 237 LIS to SFO yesterday had an interesting diversion - it was going over South Dakota when it fairly rapidly diverted northwards to FAR airport - Fargo, Hector International, ND. It was aircraft CS-TUD, which is an A330-900 Neo.

I am presuming this was some technical issue that needed immediate attention, since while FAR has a huge runway, it doesn't do international services, despite the name. There is a customs post there for the now non existent Canada service. The aircraft is still there at the time of writing. No news on the passengers yet.