We survived the 9-and-a-half hour flight from Arusha via Dar es Salaam, where the screaming child deplane. Now we have a three-hour layover in Amsterdam. United isn't open yet, so we find a power outlet and read for a while. Check-in goes smoothly, so we head for the lounge, finding it open this time.
We hook up with Don and Marian once more at boarding. Since the premium cabins are only half full (again) they've had no trouble getting standby seats.