Business leaders have been urged by the Home Secretary to take immediate action to tackle the "evil" of modern-day slavery…Theresa May said companies must be confident they are not dealing with slave drivers…[and] flight attendants should be given more power to report unusual behaviour…The Home Secretary said the travel industry also had a role to play and praised airline Virgin Atlantic and holiday firm Thomas Cook, who have developed a human trafficking training package for flight attendants so they have more power to report unusual behaviour…As well as launching the National Crime Agency, which deals with human trafficking, a Modern Slavery Unit has been set up within the Home Office…The Home Secretary also pledged to clamp down on human trade in "source countries"…