Facebook boss Mark Zuckerberg rang the opening bell remotely to cheers 10 years ago as the beloved social network made its stock market debut, culminating an all-night hackathon that included street hockey, costumes and music.Facebook boss Mark Zuckerberg rang the opening bell remotely to cheers 10 years ago as the beloved social network made its stock market debut, culminating an all-night hackathon that included street hockey, costumes and music.