US Antarctic Program Helicopter (IMAGE) U.S. National Science Foundation Caption In this 2012 photo, a US Antarctic Program helicopter flies through the McMurdo Dry Valleys. Credit Elizabeth Mockbee, NSF 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.