David Marcus, head of Facebook's blockchain subsidiary Calibra, testifies before the Senate Banking, Housing and Urban Affairs Committee on "Examining Facebook's Proposed Digital Currency and Data Privacy Considerations" on Capitol Hill in Washington D.C., the United States, on July 16, 2019. (Xinhua/Liu Jie)
Portraits of July 2019
Source: Xinhua| 2019-07-31 22:00:54|Editor: Wu Qin
