Tim Merriman and Bill Gwaltney talk story with Daniel Martinez on Reflections on Interpretation. For historian Daniel Martinez, history isn’t just something to study—it’s something you feel. After 44 years with the National Park Service, most recently as historian at the Pearl Harbor National Memorial, Martinez reflects on a career dedicated to keeping the past vividly alive.

From his own family’s memories of December 7, 1941 to his years connecting with survivors, leaders, and visitors, Martinez has helped countless people see the human side of history—and feel its lasting presence.

He shares the stories, moments, and relationships that shaped his life’s work from his start at Little Bighorn Battlefield National Monument to Pearl Harbor and why the lessons of war, peace, and resilience still matter today.

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Gary Candelaria brings a lifetime of dedication to America’s public lands to this episode of Reflections on Interpretation: Talking Story with Guides and Interpreters. Raised in Los Angeles and inspired early on to become a park ranger, he pursued that dream through a forestry degree at Oregon State University before entering the prestigious Intake Ranger program in 1975. His first assignment at Saratoga National Historical Park during the nation’s Bicentennial set the stage for a distinguished National Park Service career.

Candelaria went on to serve in key leadership roles across the country, Assistant Chief of Interpretation at Ozark National Scenic Riverways, Chief Ranger at Sitka National Historical Park, and Superintendent at Fort Laramie National Historic Site, Pinnacles (then National Monument), and Wrangell–St. Elias National Park & Preserve. Along the way he earned a master’s degree from the University of Oklahoma and worked in Washington, D.C., as assistant to Director Roger Kennedy.

Before retiring in 2008, Candelaria capped his service as Assistant Director of Harpers Ferry Center and Associate Regional Director for Cultural Resources in Omaha. Now living in Sharpsburg, Maryland, he continues contributing to historical scholarship as a contractor for the U.S. Navy, updating the Dictionary of American Naval Fighting Ships.

Join Bill Gwaltney and Tim Merriman as Gary reflects on a remarkable career shaped by curiosity, stewardship, and a deep commitment to interpretation.

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Costa Dillon is a retired National Park Service ranger and park superintendent who worked in more than a dozen parks in his 35-year career including as Superintendent of Indiana Dunes National Park, Fire Island National Seashore, and the Horace Albright Training Center. He is the recipient of the Department of the Interior’s Meritorious Service Award, the National Parks Conservation Association's Stephen Mather Award, and the National Association for Interpretation’s Meritorious Service Award.

Mr. Dillon has a B.S. from the University of California, Davis, and a Master of Public Administration from the University of Colorado. Costa has been an adjunct faculty member of the University of New Hampshire and Indiana University where he is an Honorary Fellow of the Eppley Institute for Parks and Public Lands.. He currently teaches at San Diego State University and California State University, San Marcos.

Mr. Dillon is the creator and principal writer of the feature film Attack of the Killer Tomatoes, as well as five other feature motion pictures.

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