WASHINGTON (AFP): Facebook’s Sheryl Sandberg said she was devastated by the sudden death of her husband Tuesday but lucky to have known him and shared her life with him. US tech executive David Goldberg apparently died after falling on a treadmill and striking his head at an upscale resort in Mexico. It was a terribly tragic blow for one of America’s best known business executives, famous for her efforts to encourage women’s empowerment. Goldberg, 47, was the chief executive of online polling firm SurveyMonkey.

 He died suddenly Friday, according to his brother, who did not give a cause of death.