A former fighter pilot who saw Tic Tac-shaped UFOs in 2004 says her Navy colleagues stayed quiet for fear of being labeled 'kooky'.

Mother-of-three Alex Dietrich, 41, says she feels a 'duty' to speak up about her close encounter with unidentified aerial phenomena because she sees it as a vital matter of national security.

Dietrich appeared on a recent 60 Minutes special on unexplained aerial phenomena and also speaks regularly to House and Senate enquiries into UFOs, and says military pilots fear the stigma of being associated with UFOs.

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