Saying that the fight for freedom is a never-ending battle, Memorial Day keynote speaker Lt. Colonel Mark H. Ochsenbein told those on hand at the local observance that the best way to repay those who have made the ultimate sacrifice for their country is to never forget their service.“Eternal vigilance is the price of our freedom,” Ochsenbein said to the couple of hundred on hand for the morning service at Warren County Memorial Airport. “Our freedom is not free.”Ochsenbein, a veteran of many operations and deployments and himself a highly decorated soldier, praised the service of soldiers throughout America’s wars.“Service has always been a noble calling, ever since Lexington and Concord,” Ochsenbein said, adding Tennessee became known as the volunteer state for its numbers of persons who served their country. “Tennesseans have always answered the call from Kings Mountain to today’s War on Terror.”Ochsenbein called the name of several heroic Tennesseans who died in battle, including local heroes Bobby Ray and Jeremy Brown, the latter of whom was killed in action in 2010 in Afghanistan.