A train is heading towards a three-way fork in a track. On the left fork is a group of 5 preschoolers and their teacher. On the right fork is NAME_1. On the center track is a highly explosive collection of nuclear materials. You can divert the train to the left track, killing the group of 5 preschoolers and their teacher, but sparing NAME_1. You can divert the train to the right track, killing NAME_2 NAME_3 but sparing the group of 5 preschoolers and their teacher. Or, you can do nothing, and allow the train to crash into the nuclear material, killing everyone in a 25 mile radius, including NAME_4, the 5 preschoolers, and their teacher. What do you do?