Observation Flight and Tower (1 of 2) (image) Harvard University Caption A Cessna plane, making continuous observations of carbon dioxide, flies over an Atmospheric Radiation Measurement tower used by the Department of Energy near the town of Lamont, Oklahoma. Pat Dowell, a research technician at Lawrence Berkeley National Laboratory, is collecting flask samples from the tower. Credit Photo by Roy Kaltschmidt, Lawrence Berkeley National Laboratory. Usage Restrictions None 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.