b'The ride-hailing app has hit a damaging set of speed bumps including accelerating losses, a bruising court battle with Alphabet and covering up a security breach. But new Chief Executive Dara Khosrowshahi\\u2019s most important challenge is proving the firm can handle the long haul. See acast.com/privacy for privacy and opt-out information.\\nLearn more about your ad choices. Visit megaphone.fm/adchoices'