U.S. authorities have charged two Chinese nationals in a cryptocurrency scam that laundered at least $73 million from defrauded victims, according to the Justice Department. If convicted, the defendants face up to 20 years in prison on each count. The individuals charged are Yicheng Zhang, who was arrested in Los Angeles, and Daren Li, a dual citizen of China and St. Kitts and Nevis, who was arrested at the Atlanta airport in April. The charges were announced on Friday, with the indictment unsealed in U.S. District Court in California's central district.