James D. WalkerJames D. Walker is the Director and an acting Institute Scientist in the Engineering Dynamics Department in the Mechanical Engineering Division at the Southwest Research Institute in San Antonio, Texas, and has worked in impact mechanics for over 30 ears. He received the ASME Holley Medal for exceptional engineering in the public good for his work in the space shuttle Columbia accident investigation. He is a Fellow of AIAA, ASME, and the International Ballistics Society. Read More Read Less