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Col. Kyle Kremer speaks in front of a formation during a Sept. 11 memorial retreat at Scott Air Force Base, Ill., Sept. 11, 2013. Kremer presided over the ceremony which was held in remembrance of all those lost on Sept. 11, 2001. Kremer is the 375 Air Mobility Wing commander. (U.S. Air Force photo/Staff Sgt. Jonathan Fowler)
375 Air Mobility Wing honor guard members stand at attention during a memorial retreat at Scott Air Force Base, Ill., Sept. 11, 2013. The retreat was held in honor of the men and women who lost their lives during the attacks on Sept. 11, 2001. (U.S. Air Force photo/Staff Sgt. Jonathan Fowler)
A piece of the World Trade Center's is displayed to honor the victims of the 9/11 terror attacks at Scott Air Force Base, Ill, Sept. 11, 2013. (U.S. Air Force photo/Staff Sgt. Christopher Boitz)
Mike Johnson takes a moment to reflect at the 9/11 memorial on Scott Air Force Base, Ill., Sept. 11, 2013. Johnson is a station chief assigned to the 375 Civil Engineer Squadron fire department. (U.S. Air Force photo/Staff Sgt. Christopher Boitz)
Col. Kyle Kremer offers remarks during a retreat ceremony honoring the victims of the 9/11 terror attacks Sept. 11, 2012, Scott Air Force Base, Ill. The ceremony provided Team Scott a means to reflect on the tragedy that claimed the lives of 2996 people. Kremer is the commander of the 375 Air Mobility Wing. (U.S. Air Force photo/Staff Sgt. Christopher Boitz)
A formation of U.S. service members renders a salute to the U.S. flag during a retreat ceremony honoring the victims of the 9/11 terror attacks Sept. 11, 2012, Scott Air Force Base, Ill. (U.S. Air Force photo/Staff Sgt. Christopher Boitz)
Staff Sgt. Steven Short secures the U.S. flag during a retreat ceremony honoring the victims of the 9/11 terror attacks Sept. 11, 2012, Scott Air Force Base, Ill. The ceremony provided Team Scott a means to reflect on the tragedy that claimed the lives of 2996 people. Short is a fire inspector assigned to the 375 Civil Engineer Squadron. (U.S. Air Force photo/Staff Sgt. Christopher Boitz)
A flag detail folds the flag during a retreat ceremony honoring the victims of the 9/11 terror attacks Sept. 11, 2012, Scott Air Force Base, Ill. The ceremony was held on the twelfth anniversary of the attacks that claimed the lives of 2996 people. (U.S. Air Force photo/Staff Sgt. Christopher Boitz)