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)
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** Apple CEO Tim Cook speaks Sept. 12, 2012, during an introduction of the new iPhone 5 in San Francisco. (Associated Press)
Apple CEO Tim Cook speaks about the iPad's impact on the marketplace during the introduction of the iPad Mini in San Jose, Calif., on Tuesday, Oct. 23, 2012. The device has a screen that's about two-thirds the size of the full-size model and will cost $329 and up. (AP Photo/Marcio Jose Sanchez)
**FILE** Apple CEO Tim Cook announces a new iPad on March 7, 2012, in San Francisco. (Associated Press)
**FILE** Apple CEO Tim Cook announces a new iPad on March 7, 2012, in San Francisco. (Associated Press)
Apple CEO Tim Cook speaks Sept. 12, 2012, during an introduction of the new iPhone 5 in San Francisco. (Associated Press)
**FILE** Apple CEO Tim Cook speaks Sept. 12, 2012, during an introduction of the new iPhone 5 in San Francisco. (Associated Press)
Apple CEO Tim Cook speaks at the Apple Developers Conference in San Francisco on Monday, June 11, 2012. (AP Photo/Paul Sakuma)
