http://www.newsweek.com/elon-musk-breaks-down-during-interview-admits-needing-ambien-sleep-1077618 > Tesla boss Elon Musk broke down in tears during an interview this week, detailing the professional and personal pressures caused by running the company. > At times defiant, the billionaire technologist maintained there was no-one else who could run the business better than him. Musk also claimed he did not regret sending a controversial tweet about taking Tesla private, which led to an alleged Securities and Exchange Commission probe.