i'm craig melvin. thanks for watching. [theme music] . i'm craig melvin. and i'm natalie morales.garten teacher. there was nothing about her life that would raise any red flags. craig melvin (voiceover): she amazed them all, her whole group of girlfriends at the gym. she was totally dedicated, i say, heather, turn around.

i'm craig melvin. thanks for watching. [theme music] . i'm craig melvin. and i'm natalie morales. and this is "dateline." f two. she was a kindergarten teacher. there was nothing about her life that would raise any red flags. craig melvin (voiceover): she amazed them all, her whole group of girlfriends at the gym. she was totally dedicated, i say, heather, turn around. you've gotten smaller. craig melvin (voiceover): a stunning 200-pound weight loss and a whole new life came with it. you could see that transformation. you could see the confidence in her. craig melvin (voiceover): then she was gone, missing at school. i called all the girlfriends. we're going to find you, one way or the other. craig melvin (voiceover): the clues-- an email to her husband and a secret she was reluctant to share. kind of a bombshell. heather was possibly seeing another man. craig melvin (voiceover): what was really behind her sudden disappearance? that would be the most mind-blowing twist of all. do you think that heather would still be alive if she hadn't gone through this transformation? gosh. welc

craig melvin (voiceover): she'd been fearless

i'm craig melvin. thank you for watching. >> hello and. >> welcome to. >> morning joe weekend. here are some of the most important conversations we had over this. >> very busy news week. >> you must have only the highest standards for those who work in our aviation system. i changed the obama standards from very mediocre at best to extraordinary. i put safety first. obama, biden and the democrats put policy first, and they put politics at a level that nobody's ever seen. they put a big push to put diversity into the faa's program. the faa is actively recruiting workers who suffer severe intellectual disabilities, psychiatric problems, and other mental and physical conditions under a diversity and inclusion hiring initiative spelled out on the agency's website. can you imagine they actually came out with a directive to white, and we want the people that are competent. >> i'm trying to figure out. >> how you. >> can come to the. >> conclusion right now that diversity. >> had something to do with this. >> crash. >> because i have common sense, okay. and unfortunately, a lot of peo