Collin Amon (left) and LeeAnn Williams, Fairborn High School advanced placement environmental science students, prepare the soil for planting a redbud tree as part of the 88th Civil Engineer Group and the National Park Service volunteer efforts for Arbor Day on the grounds near the Wright Brothers Memorial, Dayton, Ohio, April 11, 2019. The students volunteered their support efforts in honor of Arbor Day, an annual holiday for the planting of trees, observed throughout the nation. (U.S. Air Force photo by Michelle Gigante)