Service at Flight 93 National Memorial (9 images)

A young visitor pauses along the "Wall of Names" at the Flight 93 National Memorial on the eve of the 12th Anniversary of the crash of Flight 93 near Shanksville, Pennsylvania on September 10, 2013. UPI/Archie Carpenter

A visitor walks to the "Wall of Names" as the sun sets at the Flight 93 National Memorial near Shanksville, Pennsylvania on September 10, 2013. UPI/Archie Carpenter

A visitor to the Flight 93 National Memorial remains for a few minutes beyond the finish of the luminaria service on the eve of the 12th Anniversary of the crash of Flight 93 near Shanksville, Pennsylvania on September 10, 2013. UPI/Archie Carpenter

Volunteers and family members take part in a luminaria service at the Flight 93 National Memorial on the eve of the 12th Anniversary of the crash of Flight 93 near Shanksville, Pennsylvania on September 10, 2013. UPI/Archie Carpenter