MEMORANDUM OF UNDERSTANDING U.S. Defense Secretary Robert M. Gates, left, and Russian Defense Minister Anatoliy Serdyukov, right, sign a memorandum of understanding at the Pentagon, Sept. 15, 2010. The document provides a framework for a variety of cooperative, military-to-military programs to be undertaken during the coming year. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 675635-H-AVQ35-761.jpg Photo Gallery