Karen Lee Valdez-Blackburn, a 26-year-old vehicle mechanic assigned to the 90th Transportation Squadron at F.E. Warren Air Force Base, was last seen in Cheyenne, Wyoming on November 21, 1983. On the day of her disappearance, Valdez-Blackburn was observed loading her yellow Dodge Ram pickup truck which had a Colorado license plate with the number 4250JX. She reportedly told a friend that she was leaving and was believed to be heading to Denver, Colorado, to visit another friend.
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...Read MoreLast Seen: Nov 21, 1983
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