FORT WORTH, TX - NOVEMBER 06:  The American Flag flies at half-mast during practice for the NASCAR Nationwide Series O'Reilly Challenge at Texas Motor Speedway on November 6, 2009 in Fort Worth, Texas. The flag hangs at halfmast due to incident involving Major Nidal Malik Hasan an army psychiatrist, who killed 13 people and wounded 30 in a shooting at the military base at Fort Hood yesterday.  (Photo by Jonathan Ferrey/Getty Images for NASCAR)