Families of Prisoners of War and Missing in Action service members will be honored at the Seahawks game on Sunday.

Seahawks defensive end Michael Bennett will honor the families as part of the Seahawks’ My Cause, My Cleats campaign where players showcase causes and charities close to their hearts.

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One of the groups that will be honored is the family of Tri Cities-native Major San D. Francisco, whose remains have yet to be brought back to the U.S. 49 years after his death.

Francisco was killed after his plane was shot down in enemy territory during the Vietnam War in 1968. Francisco’s sister, Terri Francisco, petitioned the government for decades to bring her brother back home.

Several potential burial sites were identified in 2016, and so far one and a half sites have been excavated. There are plans for the second site to finish excavation in June and July 2018. A third potential site was identified in October, and will be excavated in August and September 2018 if Francisco’s remains have not yet been found.

After Francisco’s remains are located, they will be sent to Hawaii to be catalogued and confirmed through DNA testing.