The National Park Service is creating a giant, living version of its emblem on the National Mall on Thursday. The park service says more than 1,000 people will use brown, green and white umbrellas to recreate the emblem. The first 1,000 people to arrive will get to keep their umbrella and a T-shirt commemorating their participation. The park service says it will take on aerial photograph of the emblem that it will share on the National Mall and Memorial Parks website and social media. The emblem contains elements that symbolize major facets of the national park system, the park service says.