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In Operation Isotope, which counterterrorism unit foiled a hijacking attempt of Sabena aircraft in 1972?

  1. Mossad

  2. Delta Force

  3. Unit 269

  4. NSG

The correct answer is: Unit 269

Unit 269 is the correct answer because it was a special forces unit in the Israeli Defense Forces responsible for counterterrorism operations. Mossad, the national intelligence agency of Israel, focuses more on intelligence gathering and covert operations rather than direct action. Delta Force is a U.S. special operations force and would not have been involved in an operation in Israel. NSG, or National Security Guard, is a counterterrorism unit in India and would not have been involved in an operation in Israel in 1972.