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KENNEDY SPACE CENTER, Fla. -- NASA held its "Day of Remembrance" at the Kennedy Space Center Visitor Complex on Thursday, Jan. 25, 2018 to honor the fallen U.S. space flight pioneers who lost their lives working to expand our knowledge of the final frontier. Attendees to the 2018 event included: Buzz Aldrin, Colonel Eileen Collins, Robert Cabana, Thad Altman, the Visitor Complex's Chief Operating Officer Therrin Protze, and numerous other astronauts, officials and crew family members. This year marked the 15th anniversary of the loss of Space Shuttle Columbia on mission STS-107. Photos courtesy: Mike Howard, Sean Costello, Ryan Chylinski
