Swift (IMAGE) University of Zurich Caption Swift was trained in a simulated environment in which the system taught itself to fly according to the principle of trial and error. (Image: Leonard Bauersfeld) Credit (Image: Leonard Bauersfeld) 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.