(DC) (Rock Creek Conservancy) Join Rock Creek Conservancy, the National Park Service, Weed Warrior leader Danna McCormick, and Friends of Peirce Mill for this invasive plant removal restoration event in Rock Creek Park. Invasive plants are a major threat to our fragile forests, and stopping their spread helps allow native plants to thrive in the understory. Event location, directions, and information will be sent from the event leader 48 hours prior to the event.