During non-emergency times, drivers of school buses must own and maintain a class D commercial license or better depending on the exact size and weight of the bus. During an emergency any driver is suitable as long as approved by the governor. In spite of risks and his lack of formal training or license, 20-year-old Jabbar Gibson commandeered a New Orleans school bus and rescued 70 people from the rising floodwaters before making the 13-hour drive to Houston's Reliant Astrodome, arriving on Wednesday evening. A day later a commercially licensed driver's bus filled with evacuees flipped, resulting in one death and many injuries after a passenger fought with the driver.