Cyclic Outbreaks (IMAGE) Columbia Climate School Caption The long war leading to South Sudan's recent independence kicked off during the powerful El Nino drought of 1983. In continuing hostilities, southern fighters display a grenade launcher captured from the northern Sudan Armed Forces, July 2011. Credit Trevor Snapp Usage Restrictions Permission to reproduce must be obtained from photographer. trevorsnapp@gmail.com 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.