This week, we hear some shocking insights from a former Theranos lab director who says he tried to stop the train before it ran off the tracks.\xa0From failing machines to a lack of proficiency testing, he tells of the pressure he felt to vouch for tests while maintaining his integrity as a lab director.\xa0And he describes how he says he tried to delay the Walgreens launch, pleading with a \u201cnervous\u201d Elizabeth, who went forward nonetheless. But does an aggressive and lengthy cross-examination undermine his claims?
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