Title: U.S. Air Force, Memorandum, Calibration Flights of Turkish Radar Sites and Electronic Reconnaissance in the Black Sea Area, April 7, 1950, Top Secret, NARA.
Creator: U.S. Air Force
Date in Source: April 7, 1950
Subject: Turkey - Soviet Union - ELINT - Ferret flights - Black Sea - State Department approval needed - Cover story
Format: 4 p.
Note: Top Secret