L. to R.: Willi Dansgaard, Chet Langway, Hans Oeschger in the sub-ice trench at Dye-3 on theGreenland icecap, just after the GISP ice-drilling operation reached bedrock on August 10, 1981.

Photo by J. Murray Mitchell (who was visiting the site).
AIP Emilio Segrè Visual Archives, gift of C. Langway.