Mark Zuckerberg's extravagant 387-foot megayacht, 'Launchpad', sets sail from San Diego Harbor! See the stunning video and learn about its cost, top speed, and accompanying support vessel, 'Wingman'. Plus, learn more about a recent security incident involving Zuckerberg's fleet. #MarkZuckerberg #Megayacht #Launchpad #Luxury #TechBillionaire #SanDiego