Brig. Gen. David Reist, Lt. Gen. John Bergman and Brig. Gen. Melvin Spiese address University of Chicago Booth School of Business students during a visit to the school May 12 as part of Marine Week 2009. All three generals answered questions about changes they have seen in the Marine Corps throughout their careers and how a civilian might be able to apply Marine leadership concepts in their businesses. - Brig. Gen. David Reist, Lt. Gen. John Bergman and Brig. Gen. Melvin Spiese address University of Chicago Booth School of Business students during a visit to the school May 12 as part of Marine Week 2009. All three generals answered questions about changes they have seen in the Marine Corps throughout their careers and how a civilian might be able to apply Marine leadership concepts in their businesses.