At a time when Boeing is in a dive, there is another crash in Iran, this time a standard 737, not the Max, and it happened minutes after takeoff during climb, no mayday call, one story is a witness saw an engine fire. My guess is some type of explosive device, not just a natural cause.
Their govt there says they will not send the "black boxes" to Boeing or the U S. I can understand why there is a distrust about this, however I hope they have a tech expert from Boeing and the NTSB travel there and share the downloading of the data to find the cause.

By the way, Boeing now says that when/if the Max flies again crews should have a simulator program to transition into the new plane.