Research and analyze two operations that utilized national security or miltary counterintelligence (either offensive or defensive functions). What were the specific challenges to counterintelligence for each operation? Compare and contrast how counterintelligence measures changed over the particular time periods of the operations. Example time periods may include early American history to WWI, WWI to WWII, WWII, the Cold War, the post-Cold War/pre-9/11 era, post-9/11, etc. Finally, put the operation and the lessons learned within the context of how it may have influenced the development of the current U.S. National Counterintelligence Strategy of 2016.