A gift shop staff member uses letter pressing machine to make cards for a customer at the South Street Seaport Museum in New York, the United States, July 6, 2018. The South Street Seaport Museum launched its "Free Friday" event on Friday and will be open for free to the public every Friday until Sept. 22, 2018. The museum is a cultural institution dedicated to telling the story of the rise of New York as a port city and its critical role in the development of the United States. (Xinhua/Lin Bilin)