Sen. Rand Paul, Kentucky Republican, expresses his displeasure that Apple CEO Tim Cook was being brought before the Senate Homeland Security and Governmental Affairs Permanent Subcommittee as the panel examines the methods employed by multinational corporations to shift profits offshore and how such activities are affected by the Internal Revenue Code, on Capitol Hill in Washington on Tuesday, May 21, 2013. (AP Photo/J. Scott Applewhite)
** FILE ** Apple customers look at the Apple MacBook Air in San Francisco. (Associated Press)
Apple CEO Tim Cook sits as a guest of first lady Michelle Obama prior to the start of President Barack Obama's State of the Union address during a joint session of Congress, Tuesday, Feb.12, 2013, on Capitol Hill in Washington. (AP Photo/Pablo Martinez Monsivais)
**FILE** The Apple logo is seen Oct. 4, 2011, during an announcement at Apple headquarters in Cupertino, Calif. (Associated Press)
**FILE** Phil Schiller, Apple's senior vice president of worldwide marketing, watches on stage Sept. 12, 2012, the unveiling of the new iPhone 5 at an Apple event in San Francisco. (Associated Press)
** FILE ** In this Tuesday, Oct. 4, 2011, file photo and Apple logo is seen during an announcement at Apple headquarters in Cupertino, Calif. The European Union's antitrust watchdog announced Tuesday, Dec. 6, 2011, is probing whether Apple and five major publishing houses have colluded to restrict competition in the market for e-books. (AP Photo/Paul Sakuma, file)
**FILE** Apple CEO Tim Cook speaks Sept. 12, 2012, during an introduction of the new iPhone 5 in San Francisco. (Associated Press)
The iPad Mini (left) is shown next to the fourth-generation iPad in San Jose, Calif., on Tuesday, Oct. 23, 2012. The Mini has a screen that's about two-thirds the size of the full-size model, and Apple says it will sell for $329 and up. (AP Photo/Marcio Jose Sanchez)
