Air-vortex Dispersal (IMAGE) Virginia Tech Caption Image of air-vortex dispersal of plant pathogen. The We value represents the impact speed and surface tension of water. Photo courtesy of Hyunggon Park. Credit Virginia Tech Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.