The fee-free entrance day is one of eight that the National Park Service has planned this year. WASHINGTON — The National Park Service is waiving entrance fees Monday to commemorate Memorial Day. Parks across the U.S. are hosting services and ceremonies to honor and remember U.S. service members who made the ultimate sacrifice. A list of those events is available on the National Park Service website. In addition to managing natural recreation sites, the National Park Service also preserves dozens of historical sites, such as battlefields, and includes monuments and memorials. Additionally, the agency oversees 14 national cemeteries that serve…