sentences:  Shortly before noon, with American artillery fire inexplicably withdrawn and the five supporting U.S. tanks unable to bring the North Koreans under fire because of terrain obstacles, the Argylls called for an air strike on the North Korean-held Hill 388.Just after noon the Argylls heard the sound of approaching aircraft.Three North American P-51 Mustangs of the 18th Fighter Bomber Wing circled Hill 282 where the British displayed their white recognition panels.