They are watching. ................. Public domain photo by Sgt R. Berry Johnson, USAF US National Archives 030500 - DEW line / antenna, disc K-KE 5599 Where: Sondrestrom AB, Greenland When: May 18 1970 What: Two disc antennas, directed toward Dye #1. Why: DEW (Distant Early Warning) line. US Air Force Photo Control No: 47-347 Neg 35mm cs, #250-70 Organization: 1369th PS