On the morning of the 25th, Admirals Struble and Doyle held a final conference with General Almond and Captain Spofford. By this time they had decided to land the Marines over YELLOW and BLUE Beaches on Kalma Peninsula, as originally conceived in 1stMarDiv OpnO 16-50. The inner harbor of Wonsan would remain closed until completely clear of mines, and then it would be developed as a supply base.[84] [84] ComPhibGruOne, “Operations Report,” 12–13; Smith, _Notes_, 407; CG 1stMarDiv msg to subordinate units, 1450 24 Oct 50; Smith ltr, 3 Feb 56. _Marine Air First at Objective_ The sense of frustration which oppressed the Marine ground forces during Operation Yo-Yo would have been increased if they had realized that the air maintenance crews had beaten them to Wonsan by a margin of twelve days. Even more humiliating to the landing force troops, Bob Hope and Marilyn Maxwell were flown to the objective area. On the evening of the 24th they put on a USO show spiced with quips at the expense of the disgruntled Leathernecks in the transports. Planning for Marine air operations in northeast Korea had been modified from day to day to keep pace with the rapidly changing strategic situation. On 11 October, when ROK forces secured Wonsan, preparations for air support of an assault landing were abandoned. Two days later Major General Field Harris, CG 1st Marine Aircraft Wing and Tactical Air Command X Corps (TAC X Corps), flew to Wonsan. After inspecting the airfield he decided to begin operations without delay.[85] [85] Unless otherwise stated this section is based on: 1stMAW _HD_, _Oct 50_; 1stMAW _SAR_, annex K (hereafter MAG-12 _SAR_), 1, appendix G (hereafter VMF-312 _SAR_), 3, 5–6; and Smith, _Notes_, 433–441. These developments, of course, were accompanied by amendments to the original plan which had assigned Marine Fighter Squadrons (VMFs)-214 and -323 the air support role in the naval task force, with Marine Aircraft Group (MAG)-12 to be landed as soon as the field at Wonsan was secured. In response to changing conditions, VMF-312 aircraft flew from Kimpo to Wonsan on the 14th, and R5Ds lifted 210 personnel of the advance echelons of Headquarters Squadron (Hedron)-12, Service Squadron (SMS)-12, and Marine All-Weather Fighter Squadron (VMF(N))-513. Two LSTs sailed from Kobe with equipment of MAG-12, and Combat Cargo Command aircraft of Far East Air Force began flying in aviation gasoline. Bombs and rockets were flown to Wonsan by the planes of VMF(N)-513.[86] [86] E. H. Giusti and K. W. Condit, “Marine Air at the Chosin Reservoir,” _Marine Corps Gazette_, xxxvii, no. 7 (Jul 52), 19–20; 1stMAW _SAR_, annex K, appendix H (hereafter VMF(N)-513 _SAR_), sec 6, 2.