when i next saw her was at the harvard medical school board meeting where she was being introduced.d she has this low voice, and i thought, oh, my god. >> it's prestige, whether it be the turtleneck, baritone, the swagger, the sense of belief in herself. you're captivated. >> reporter: but then, as the money poured in, the problems poured out. suddenly, it wasn't just her voice that insiders were worried about. >> i would never expected anyone would behave the way that she behaved as a ceo. and believe me, i worked for steve jobs. i saw some crazy things. >> our thanks to rebecca jarvis and her entire team. "the dropout" airs friday, 8:000 central right here on abc. >>> up next, a familiar face comes in to view. ew. unpredictable crohn's symptoms following you? for adults with moderately to severely active crohn's disease, stelara® works differently. studies showed relief and remission, with dosing every 8 weeks. stelara® may lower your ability to fight infections and may increase your risk of infections and cancer. some serious infections require hospitalization. before treatment,

when i next saw her again was at the harvard medical school board meeting where she was being introduced this low voice and i'm like, oh, my god. >> rebecca has done an amazing job on this. you all can see it tomorrow night on "20/20" called "the dropout" at at 9:00 eastern. >>> all right, were you guys part of this, the great social media blackout of 2019? coming up, the meltdown. it was like the end of days. see what happened when facebook and instagram shut down for a whole eight hours. >> i was fine. (nat♪re sounds) corey is living with metastatic breast cancer, which is breast cancer that has spread to other parts of her body. she's also taking prescription ibrance with an aromatase inhibitor, which is for postmenopausal women with hormone receptor-positive her2- metastatic breast cancer as the first hormonal based therapy. ibrance plus letrozole was significantly more effective at delaying disease progression versus letrozole. patients taking ibrance can develop low white blood cell counts, which may cause serious infections that can lead to death. before taking ibrance, tell your

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