NCIS Special Agent Mike McClean plays the bagpipes during a ceremony at Marine Corps Base Quantico’s Little Hall Theater to mark the 50th anniversary of NCIS. McClean had played “Amazing Grace” each day at the Pentagon during the investigation of the 9-11 attacks by NCIS and other law enforcement agencies. His participation in the anniversary ceremony had been kept a secret until he began playing at the back of the auditorium. He walked to the front to stand momentarily near a display of 9-11 investigation memorabilia, then continued to play as he left the auditorium, bringing many in attendance to tears. - NCIS Special Agent Mike McClean plays the bagpipes during a ceremony at Marine Corps Base Quantico’s Little Hall Theater to mark the 50th anniversary of NCIS. McClean had played “Amazing Grace” each day at the Pentagon during the investigation of the 9-11 attacks by NCIS and other law enforcement agencies. His participation in the anniversary ceremony had been kept a secret until he began playing at the back of the auditorium. He walked to the front to stand momentarily near a display of 9-11 investigation memorabilia, then continued to play as he left the auditorium, bringing many in attendance to tears.