[5][6][7] Questioning McMahon during his nomination included US Senators Daniel Patrick Moynihan (who guided publication of the VENONA papers in the mid-1990s).

[4] "McMahon had clashed with Capitol Hill conservatives who considered him less than zealous in his support of aid to guerrilla fighters in Afghanistan and Nicaragua.

[7] In August 1986, McMahon joined Lockheed Martin Corporation as an executive vice president for plans and programs in its Missiles & Space Company.

[11] In May 2015, 20 ex-CIA officials, including McMahon, signed a letter opposing the decision by The New York Times to publish the names of three undercover officers working for the CIA.

[12] On April 15, 1952, McMahon married Margaret Joan Hugger, with whom he had four children: Patricia Joy, Christopher John, Timothy Richard, and Peter Collins.