In Sochi, Nevils was tasked with working with former “Today” co-anchor Meredith Vieira, who’d been brought back to the show to do Olympics coverage. In her account, one night over drinks with Vieira at the hotel bar where the NBC News team was staying, they ran into Lauer, who joined them. At the end of the night, Nevils, who’d had six shots of vodka, ended up going to Lauer’s hotel room twice — once to retrieve her press credential, which Lauer had taken as a joke, and the second time because he invited her back. Nevils, Farrow writes, “had no...