Fourth grade students at Paxton School learned first-hand about the four forces of flight from former paper airplane world record holder Ken Blackburn. Blackburn, an engineer at the Air Force Research Laboratory at Eglin Air Force Base and former world record holder for the longest flying paper airplane, taught students about lift, thrust and drag and weight. He then helped students craft their own paper airplanes. Students competed with their airplanes, taking careful measurements of the distance each plane traveled and the number of seconds it maintained flight.  Submitted by Kalli McMillan.