Imad El Haddad (IMAGE) Paul Scherrer Institute Caption Imad El Haddad is pleased that the processes in New Delhi's atmosphere, which have never been observed elsewhere, can now be better understood. Credit Paul Scherrer Insitute/Mahir Dzambegovic Usage Restrictions PSI provides image and/or video material free of charge for media coverage of the content of the above text. Use of this material for other purposes is not permitted. This also includes the transfer of the image and video material into databases as well as sale by third parties. License Original 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.