sandberg. through her book sandberg's name is synonymous with women trying to manage a work-life balance. goldberg died last week. he fell off a treadmill while exercising. today an invite only crowd attended the funeral for the executive. samuel burke joins me now. >> the details of how he spent his final hours laying on a gym floor and there's still om mystery about what hotel this happened. bub at the end how does a seemingly elthy 47-year-old millionaire die in a treadmill accident? that's the question family and friends of david goldberg are asking today. >> we are a company that was valued at well over a billion dollars a year and a half ago. but decided not to go public.