Apple CEO Tim Cook is photographed at the 2020 World Economic Forum in Davos, Switzerland. Cook will take the witness stand Friday to defend the Apple App Store against charges that it has grown into an illegal monopoly, one far more profitable than his predecessor Steve Jobs ever envisioned. Markus Schreiber/AP hide caption
The new iMac computers are unveiled on April 20 via this illustration at a virtual event in La Habra, Calif. Apple said it could suffer a hit to its revenue as a shortage of chips could affect the production of iPads and Macs. Jae C. Hong/AP hide caption
Rep. Jim Jordan, R-Ohio, speaks during a House Judiciary subcommittee on antitrust on Capitol Hill. Mandel Ngan/AP hide caption
Amazon CEO Jeff Bezos testifies Wednesday via video before the House Judiciary antitrust subcommittee. The hearing also featured the heads of Apple, Facebook and Google. Mandel Ngan/POOL/AFP via Getty Images hide caption
Amazon's Jeff Bezos, Apple's Tim Cook, Google's Sundar Pichai and Facebook's Mark Zuckerberg will face congressional questioning about whether tech has too much power. Pablo Martinez Monsivais, Evan Vucci, Jeff Chiu, Jens Meyer/AP hide caption
Apple CEO Tim Cook attributed slower sales in China in part to the devaluation of the yuan. Bebeto Matthews/AP hide caption
Apple already employs more people in Austin than it does in any other city outside of its California headquarters. The new campus will be near its existing facility in the North Austin area. Apple hide caption
Apple CEO Tim Cook speaks Monday during the 2018 Apple Worldwide Developer Conference at the San Jose Convention Center. Justin Sullivan/Getty Images hide caption
Tim Cook visited the NPR offices in Washington, D.C., in 2015. On Monday, he spoke with NPR about Apple users' privacy and the importance of trade to global relationships. Ariel Zambelich/NPR hide caption
A child plays with a mobile phone while riding in a New York subway in December. Two major Apple investors urged the iPhone maker to take action to curb growing smartphone use among children. Mark Lennihan/AP hide caption
Privacy is one of a number of issues Apple CEO Tim Cook has called morally important. Ariel Zambelich/NPR hide caption
Apple CEO Tim Cook says creating new software to break into a locked iPhone would be "bad news" and "we would never write it." He spoke with ABC News' World News Tonight with David Muir. Ariel Zambelich/NPR hide caption
A U.S. magistrate judge has ordered Apple to help the FBI break into an iPhone used by one of the two shooters in the San Bernardino attack in December. iStockphoto hide caption