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epa04968898 Volkswagen Group of America President and CEO Michael Horn prepares to testify before a House Oversight and Investigations Subcommittee hearing on 'Volkswagen's Emissions Cheating Allegations: Initial Questions' in the Rayburn House Office Building on Capitol Hill in Washington, DC, USA, 08 October 2015. Horn's testimony focuses on the 'defeat device' that has triggered the car manufacturer's emissions scandal that affects 11 million vehicles worldwide. EPA/JIM LO SCALZO