a win for trump will make three victories in a row after took first prize in surlsouth carolina and new hampshire. people said they were in favor of the outsider and of those voters, 70% said they supported the billionaire businessman. >>> we now turn to a high stakes war against trafficking. even diamonds. the coveted horn of the rhino. but now a new military grade piece of machinery is being deployed in the fight against ruthless poachers. we go to the south african bush. >> in the pitch black of the south african bush, these rangers can only listen and smell for any sign that's their enemy is near. >> if they're not quiet, they will pick you up first. >> they hunt for rhino here every night. >> we need to protect them from being shot. >> tonight our patrol has eyes in the sky. we're on the front lines of a modern war. over an ancient animal. the future of the rhino is in the balance. according to the world wildlife fun, in south africa alone, rhino poaching has skyrocketed by a growing demand for its horn. ground up and used as a popular party drug in asia. more expensive than gold a