EDITOR'S NOTE: This is the first in our two part series following human trafficking in South Carolina and the Lowcountry. Young women and children, ferried across the Lowcountry, forced into a life of sex and drugs. This week ABC News 4 rode along with federal investigators on a land, sea and air mission that started Wednesday May 19. In this first part of a two-part series, Anne Emerson and photojournalist Jason Tighe find out why agents are.