When he was 24, Tal Dehtiar found himself on a bus with a gun at his head. He was hitchhiking through South America at the time, fresh off of graduating from business school. It was while on a bus in Brazil that a gunman boarded, demanding that everyone hand over their belongings. Dehtiar refused. He told the attacker that he thought the gun was fake and, after an intense exchange, the man jumped off the…