***CAPTION CORRECTION***....Davis Hills Middle School teacher Jay Gordon, of Huntsville, Alabama conducts a fluid density experiment while participating in the Northrop Grumman Weightless Flights of Discovery program on July 28, 2006. The program, sponsored by Northrop Grumman, AOL and the Zero G Corp, invited over 80 distinguished educators from around the United States to provide first hand experience in conducting experiments in the weightless environment. Teachers are then asked to relate their experience to their students and generate interest in studying Math and Science. (UPI Photo/Joseph Marino)