What I dont understand is why the airlines themselves (Southwest and American) are refusing to halt the planes - this seems totally irresponsible with what is known at this point.
"MCAS will trim the Stabilizer down for 10 seconds (2.5 deg nose down) and pause for 5 seconds and repeat if the conditions (high angle of attack, flaps up and autopilot disengaged) continue to be met. Using electric pitch trim will only pause MCAS, to deactivate it you need to switch off the STAB TRIM SUTOUT switches." http://www.b737.org.uk/mcas.htm
If this turns out to have been a terrorist attack or something like that, a lot of people are going to have to eat their words, and millions of dollars will have been wasted for nothing.
Some countries take a more precautionary approach to risk than others where there is uncertainty, and I, personally, am happy to live somewhere that is willing to take the decision to prevent possible harm to human life instead of possible harm to (a relatively small section of) the economy, where there is uncertainty.
https://thepointsguy.com/news/despite-recent-crash-ethiopian...
That said Ethiopian is the shining exception and has, apart from a 70 year history, quite a stellar safety record.