Senate investigates Apple's offshore taxes (2013)
Senator Carl Levin's Permanent Subcommittee on Investigations called Apple chief executive Tim Cook to testify about the company's offshore tax structure. Apple held tens of billions of dollars outside the U.S. and paid little tax on it.
Cook defended the structure; the hearing drew national coverage.
The hearing shaped later international tax debates but produced no immediate law.
Shows how a single hearing can force a major tech chief executive to explain corporate strategy in public.
