According to the National Park Service, the grant from the Delta Air Lines Foundation will cover the re-opening of the park, including cleanup, administration, maintenance, and operating costs of employees not covered under fee collection funds.

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A light rain falls as Rico Aaron, Jr. (left) and Makalyn Ross (right) take their post for a photo opportunity at the birth home of Martin Luther King, Jr. at the Martin Luther King, Jr. National Historical Park in Atlanta, Thursday, January 17, 2019.

Acting Secretary of the Interior David Bernhardt said in a written statement that it “is yet another example of private organizations stepping up to ensure that our visitors from across the nation and around the world are able to have a meaningful experience at national parks despite the lapse of appropriations.”

The National Park Service is contributing funds from fees paid by park visitors for entrance, camping, parking and other services. The Department of Interior said it “has determined that these funds can and should be used to provide immediate maintenance assistance and services to parks during the lapse of appropriations.”

While other federal employees are working without pay, including Transportation Security Administration officers and others, the TSA said guidance from the Office of Government Ethics prohibits its employees from being paid with outside funds, citing language that says executive branch employees are generally prohibited from receiving salary from any source other than the government.

The MLK national park in Atlanta also includes the King Center, the Reflecting Pool, and the crypts of King and his wife, Coretta Scott King, which are run by the King family and have remained accessible during the federal shutdown.