REFILE-China offers to sell military choppers to Manila 05 Sep 2007 09:11:46 GMT Source: Reuters MANILA, Sept 5 (Reuters) - China has offered to sell 8 utility helicopters to the Philippine military as it seeks to replace its Vietnam War-era aircraft, a Philippine air force official said on Wednesday. Defence ties between China and the Philippines -- a longtime U.S. ally -- have grown steadily since 2004 when the two sides launched an annual security dialogue. Beijing has since donated $2.5 million worth of engineering equipment to the military to help it carry out development projects in areas where communist...