Ceremonial groundbreaking for National WWI Memorial held in Washington D.C.

People dressed in World War I military uniforms attend the ceremonial groundbreaking for the National World War I Memorial at Pershing Park in Washington D.C., the United States, on Nov. 9, 2017. The ceremony marked the start of the 50-million-USD project to honor those who served in World War I. (Xinhua/Yin Bogu)