WARRENSBURG, Mo. -- Members of the 509th Civil Engineer Squadron fire department stand at attention prior to a 9/11 Remembrance Ceremony at the University of Central Missouri Sept. 11, 2012. Members of the Collegiate Firefighters Association, local law enforcement and ambulance service personnel from Warrensburg, Johnson County were also in attendance to remember those whose lives were affected by the 9/11 attack. (U.S. Air Force photo/Heidi Hunt) (Released)

WARRENSBURG, Mo. – Members of the University of Central Missouri’s Army ROTC Color Guard lower the flags to half-mass during a 9/11 Remembrance Ceremony at UCM Sept. 11, 2012. Hundreds of students, faculty members and community members attended the ceremony in remembrance and to honor those who lost their lives in the 9/11 tragedy. (U.S. Air Force photo/Heidi Hunt) (Released)

WARRENSBURG, Mo. -- Scott Ammon, University of Central Missouri assistant professor and firefighter, discusses the significance of the ringing of a bell in memory of those who died from terrorist attacks Sept. 11, 2012. Additional ceremonies were planned around the nation on the anniversary of the 9/11 terrorist attacks, which involved the loss of nearly 3,000 lives and collapse of the World Trade Center towers in New York City, and fatal airplane crashes that occurred at the Pentagon and in Pennsylvania. (U.S. Air Force photo/Heidi Hunt) (Released)

WARRENSBURG, Mo. -- Anna Kay, a University of Central Missouri freshman, sings the National Anthem during a 9/11 Remembrance Ceremony at UCM Sept. 11, 2012. The ceremony included a welcome from Charles Ambrose, UCM President, and keynote remarks from retired Brig. Gen. Larry D. Kay, executive director of the Missouri Veterans Commission. (U.S. Air Force photo/Heidi Hunt) (Released)