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
