singapore, aero mexico joining indonesia and all of china. u.s. based carriers sticking with the boeing model. american airlines flies 24, southwest flies 34. and they will continue to do so. >> experts' opinions on whether to fly the 737 max 8 are mixed. former ntsb chief jim hall says boeing should, quote, do the responsible thing and ground the plane until the cause is determined and any problems are addressed. farai sevenzo is ed flight was supposed to land. >> reporter: absolutely. and of course there are still many concerns about the boeing 737. how do americans feel about it, what have they read. here are some views. >> people were nervous. a lot of reading on the paper and also the internet. i don't think we have the option to change our mind.