Apple CEO Tim Cook, center, flanked by Peter Oppenheimer, Apple's chief financial officer, left, and Phillip A. Bullock, Apple's head of Tax Operations, are sworn in on Capitol Hill in Washington, ... more 
Apple CEO Tim Cook, center, flanked by Peter Oppenheimer, Apple's chief financial officer, left, and Phillip A. Bullock, Apple's head of Tax Operations, are sworn in on Capitol Hill in Washington, Tuesday, May 21, 2013, prior to testifying before the Senate Homeland Security and Governmental Affairs Permanent subcommittee on Investigations hearing to examine the methods employed by multinational corporations to shift profits offshore and how such activities are affected by the Internal Revenue Code. Apple, the world's most valuable company, based in Cupertino, Calif., holds a billion dollars in an Irish subsidiary as a tax strategy, according to a report issued this week by the subcommittee. (AP Photo/J. Scott Applewhite) less 
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Associated Press | Photo By J. Scott Applewhite
Tue, May 21, 2013 3:49 PM EDT