On April 20, 1999, Cassie Bernall, a 17-year-old student at Columbine High School, faced a life and death choice — tell the boy with the gun what he wanted to hear or tell him the truth. Being strong in her convictions, she chose the truth and he choose to end her life. This tragedy is one of the saddest moments of that decade and it holds for us a powerful truth about control over others: we have none. Each and every person we work with has the power of choice and nothing we say, nor how we…