A close examination of the Edward Teller’s Pitch to President Regan for Strategic Defense Initiative (SDI) will be discussed using forensic linguistics. In this five-page single-spaced leaked memo written during the same era as President Reagan’s approval of the SDI, Dr. Edward Teller clearly shows his familiarity with the UFO subject and its threat to National Security. Pages of Teller’s writing from a multiple different archival documents of the era will be rigorously compared to the leaked questioned document (QD). It will also be compared with a similar SDI document authentically written by Dr. Teller. Dr. Carol Chaski, noted forensic linguistic expert will be cited during the presentation.