Facebook says Libra won't launch without US approval

Facebook CEO Mark Zuckerberg plans to tell Congress Wednesday that the company's planned Libra cryptocurrency won't launch unless U.S. regulators approve

Zuckerberg is trying to defend Libra and alleviate concerns that the currency could sidestep financial regulators.

Libra has seen several defections among other companies that originally supported it, including Visa and MasterCard.