Secretary Cohen escorts NATO Secretary General Lord George Robertson into the Pentagon. Secretary of Defense William Cohen (right) escorts NATO Secretary General Lord George Robertson into the Pentagon on Nov. 2, 1999. This is Robertson's first visit to the Pentagon since assuming the leadership of the North Atlantic Treaty Organization in October of this year. SHARE IMAGE: Download Image: Full Size (0.04 MB) Photo By: VIRIN: 520368-I-XRK52-576.jpg Photo Gallery