Capt. Justin Sharpe spends time with his children during the Marine Corps University Picnic held at Locus Grove Park aboard Marine Corps Base Quantico on July 28, 2013. More than 36 countries participated in the Marine Corps University Picnic. - Capt. Justin Sharpe spends time with his children during the Marine Corps University Picnic held at Locus Grove Park aboard Marine Corps Base Quantico on July 28, 2013. More than 36 countries participated in the Marine Corps University Picnic.