Choose Two Counterintelligence Operations: Select two counterintelligence operations from the provided list or any other relevant operations. Ensure that one operation is from the pre-9/11 era (before September 11, 2001), and the other is from the post-9/11 era (after September 11, 2001). Provide a brief overview of each operation, including its objectives and key players. Challenges to Counterintelligence: For each selected operation, identify and analyze the specific challenges faced by counterintelligence efforts. Consider factors such as the nature of the threat, the tactics employed by adversaries, and any unique circumstances surrounding the operation. Changes in Counterintelligence Measures: Examine how counterintelligence measures evolved over the time period of each operation. Analyze any technological advancements, policy changes, or strategic shifts that occurred and assess their impact on the effectiveness of counterintelligence