Gen. Frank J. Grass, chief of the National Guard Bureau, addresses an audience during the Air Force Association's Air and Space

- Image ID: DEXJ1H
Gen. Frank J. Grass, chief of the National Guard Bureau, addresses an audience during the Air Force Association's Air and Space
MixPix / Alamy Stock Photo
Image ID: DEXJ1H
Gen. Frank J. Grass, chief of the National Guard Bureau, addresses an audience during the Air Force Association's Air and Space Conference and Technology Exposition Sept 18, 2013, at National Harbor, Md. The conference is designed to bring together the leaders, defense industry experts, academia and specialists from around the world to discuss the issues and challenges facing the United States and aerospace community today.

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