Eighteen year-old Seamus Donahue shared a passion for long distance running with his father, Maj. Michael Donahue of the Army’s 82nd Airborne Division. When his father was killed by a suicide bomber in Afghanistan last year, Donahue decided to run the Marine Corps Marathon in his memory.

Donahue finished the 26.2 mile race alongside 23,000 other runners. When he had crossed the finish line, he draped his newly-won medal over his father’s grave at Arlington National Cemetery in a heart-warming tribute.

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“I placed my medal there and I thought, he’d be really proud of me. I felt like I did the right thing. I left the medalm” Donahue said.