For the past three years, no trainer in America has won more races than Karl Broberg. He has been described as `the most driven man in horse racing’ with an insatiable appetite for success. But Broberg’s 2016 took a tragic turn when his wife Samantha was declared lost at sea after falling overboard from a cruise ship in May. This week, Broberg talks about putting his life back together and raising his four children after the tragedy.