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... What she's saying: "Throughout those seven years, I saw Meta executives repeatedly undermine U.S. national security and betray American values," the prepared opening testimony of Wynn-Williams reads.

- - - "They did these things in secret to win favor with Beijing and build an $18 billion dollar business in China," the former New Zealand diplomat will say.

- - - "During my time at Meta, company executives lied about what they were doing with the Chinese Communist Party to employees, shareholders, Congress, and the American public," per the opening testimony.

- - - Wynn-Williams will say she's appearing before the committee "to set the record straight about these illegal and dangerous activities," per the prepared testimony.

The other side: Meta spokesperson Andy Stone in a Tuesday evening emailed statement called the testimony "divorced from reality and riddled with false claims." ...