Thursday, on what would have been his daughter Abbie’s 23nd birthday, Jimmy DeLoach Jr. of Savannah talked about turning from the pit of a parent’s grief to an effort to bring light into the world. Abbie DeLoach was one of the five Georgia Southern University nursing students who died April 22, 2015, when a tractor-trailer rig crashed into their two vehicles and others on Interstate 16. A junior and 21 years old, she was on the verge of completing her clinical experience at a Savannah hospital and planned to make a mission trip to China with her father that summer.