Elon Musk has subpoenaed his friend and former Twitter CEO Jack Dorsey as part of his legal effort to get out of his acquisition of the social media platform. Liesa Johannssen-Koppitz/Bloomberg via Getty Images;Eva Marie Uzcategui/Bloomberg via Getty Images hide caption
Jack Dorsey
Jack Dorsey is stepping down as the CEO of Twitter, which he co-founded. Here he's shown at a bitcoin convention in June. Joe Raedle/Getty Images hide caption
Mark Zuckerberg, chief executive officer of Facebook Inc., speaks virtually during a House Energy and Commerce Subcommittees hearing. Daniel Acker/Bloomberg via Getty Images hide caption
Google's Sundar Pichai, Facebook's Mark Zuckerberg and Twitter's Jack Dorsey face Congressional scrutiny over the spread of misinformation on their platforms. Michael Reynolds-Pool/Getty Images/Composite by NPR hide caption
Twitter CEO Jack Dorsey testifies remotely during a Senate Judiciary Committee hearing about how social media companies handled election misinformation. Hannah McKay-Pool/Getty Images hide caption
Twitter CEO Jack Dorsey testifies remotely during a Senate Commerce Committee hearing Wednesday about reforms to Section 230, a key legal shield for tech companies. Greg Nash/Pool/Getty Images hide caption
Days Before Election, Tech CEOs Defend Themselves From GOP Accusations Of Censorship
Twitter CEO Jack Dorsey, Google CEO Sundar Pichai, and Facebook CEO Mark Zuckerberg will testify on Wednesday before the Senate Commerce Committee about a legal shield known as Section 230. Jose Luis Magana, LM Otero, Jens Meyer/AP hide caption
Jack Dorsey's dual roles as CEO of Twitter and Square is drawing pressure from an activist investor, which is pushing for changes at the social media company. Drew Angerer/Getty Images hide caption
Jack Dorsey, Twitter's Eccentric CEO, Could Be Looking For A Job Soon
Twitter will stop running political ads, CEO Jack Dorsey announced Wednesday. Online political ads pose "significant risks to politics," he tweeted. Denis Charlet/AFP/Getty Images hide caption
An MIT study tracked 126,000 stories and found that false ones were 70 percent more likely to be retweeted than ones that were true. Matt Rourke/AP hide caption
Can You Believe It? On Twitter, False Stories Are Shared More Widely Than True Ones
The Twitter symbol appears above a trading post on the floor of the New York Stock Exchange. Richard Drew/AP hide caption
Milo Yiannopoulos, a conservative writer and Internet personality, holds a news conference down the street from the Pulse nightclub in Orlando, Fla., last month. Drew Angerer/Getty Images hide caption
Twitter's board named co-founder Jack Dorsey the company's permanent CEO last week. Justin Tallis/AFP/Getty Images hide caption
A worker unveils a floor mat bearing the logo of Twitter on the floor of the New York Stock Exchange. Andrew Burton/Getty Images hide caption