MILWAUKEE (CBS 58) -- A labor of love and gratitude at Wood National Cemetery on Thursday.

Volunteers placed American flags at the graves of everyone buried there.

It's all in preparation for Memorial Day Monday when Americans everywhere pay tribute to all who have served in the military. More than 37,000 soldiers, sailors, marines, and others lie at rest at Wood Cemetary. 

Their service will be honored at a special ceremony at 9:30 a.m. on Monday morning.