An advocacy group on Tuesday filled the lawn in front of the Capitol building with cutouts of Facebook CEO Mark Zuckerberg Mark Elliot Zuckerberg2.5 million US users register to vote using Facebook, Instagram, Messenger Hillicon Valley: Trump's ban on TikTok, WeChat in spotlight | NASA targeted by foreign hackers | Instagram accused of spying in lawsuit The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Trump contradicts CDC director on vaccine, masks MORE to protest the tech leader ahead of his congressional testimony.

Avaaz, which identifies itself as a global advocacy group focusing on national and regional issues, placed 100 cutouts of Zuckerberg on the lawn that depict him with a shirt that reads “fix fakebook.”

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“The group is calling on the CEO to ban all bots, alert the public any and every time users see fake or disinformation, fund fact checkers around the world, and submit to an independent audit to review the scale and scope of fake news,” the organization said in a press release.

Zuckerberg is set to testify Tuesday afternoon before the Senate Judiciary and Commerce committees. He will testify Wednesday before the House Energy and Commerce Committee.

He is facing growing pressure from lawmakers after it was revealed that British data firm Cambridge Analytica improperly obtained data from an estimated 87 million Facebook users.

The company previously faced scrutiny for the spread of Russian-backed ads and propaganda leading up to the 2016 presidential election. Facebook's general counsel testified to Congress over that issue.