sandu's parents say she swapped shifts at the last minute, so she did not board what would become theh with death then that has arrived to claim another. >> are you angry? >> internally, we are angry, yes. we are angry that this thing happened to us. he was our only son. >> reporter: and leaves behind not just his wife but a 10-year-old son, hans, who told his grandfather -- >> he said don't worry, i am here. i will take over from your son. he said i am now the man of the house. >> you can tell what's coming, can you? >> the head of the flight attendants union in malaysia says the unprecedented, to disasters for one airline just months apart, have shaken flight crews to the core. >> it really hits you really deep. and seeing the faces of the people that you know, the friends that you flew with for the past many years ago and some who called me just before that flight. >> reporter: sandu's parents say after this crash their daughter-in-law may never be able to fly again she left a public message for her husband in chinese on facebook. "we know you are gone and you won't be coming back.

sanjid singh sandu was a 41-year-old flight attendant everyone called bobby. he wasn't scheduled to work the flight but switched shifts with a colleague. san due switched to the flight and died. his wife is also a malaysia airlines flight attendant, scheduled to work on the malaysia jet that disappeared four months ago but switched off that flight at the last minute and lived. >> pelley: jim, thanks very much. also among the victims were nearly 100 experts on aids who were heading to a medical conference in melbourne, australia. former president bill clinton will be addressing that same conference next week. mr. clinton said he was sickened by what happened and called them martyrs to the cause in the battle against aids. more now from elizabeth palmer. >> reporter: among the men and women of science who died in this crash was a giant. joep lange, doctor and campaigner who spearheaded a push to get cheap antiviral drugs to the poor. >> he was treating the first, education -- >> reporter: his fellow researcher and friend tobias rinke de wit. >> i think we need t

flight attendant sanjay sandu wasn't supposed to fly this past thursday, but he covered a shift for aes for him. >> reporter: nbc's longtime aviation correspondent bob hager says it's not clear if the company can survive. >> it's going to be a rough road. that's absolutely certain. but one can't say right now that they're definitely going to go out of business. they may make it. >> reporter: for those flying today, the negative headlines are top of mind. >> i must say, i was anxious when i saw the news. >> the odds are okay so game on. >> reporter: this longtime malaysian airlines pilot told us he's flown the route where mh-17 was shot down more than a dozen times in recent months. >> do you think the company did enough to keep -- >> yes, i am positively sure malaysia airlines has done their best. we check everything up and so yes, the airline did their best, yeah. >> reporter: like most brands, reputation may ultimately decide the airline's fate. restoring the trust of people who are flying internationally is going to be tough for malaysia airlines. >> reporter: industry insiders say