 Complete the following phrase:  On 16 June 2011, Airbus A321-200 Flight 324 operated by Asiana Airlines HL7763 between Chengdu Shuangliu International Airport, China and Incheon International Airport was fired upon by two soldiers of the Republic of Korea Marine Corps as it came in to land at Incheon. A total of 99 rounds were discharged at the aircraft, which was out of range and made a safe landing without sustaining any damage. The soldiers had misidentified the aircraft as belonging to the North Korean military, and were acting on orders that gave them permission to engage without reference to senior officers, following the 