Meredith Kane Sokol, left, and her sister Lisa Sabo participated in the Princeton Battlefield Society’s Spring Clean-up Day March 19. Besides leaf raking, stick and trash pick up, rut fixing and land clearing, a major focus of the clean-up was nipping off new bamboo growth.  Bamboo is an invasive species that has invaded the Park and the Battlefield Society has been making progress in pushing it back and letting native species return. (Photo by John Lien)