Warren Buffett, chairman and chief executive officer of Berkshire Hathaway Inc., left, and his wife Astrid Buffett arrive to a state dinner hosted by U.S. President Barack Obama and first lady Michelle Obama in honor of U.K. Prime Minister David Cameron at the White House in Washington, D.C., U.S., on Wednesday, March 14, 2012. Obama welcomed Cameron to the White House to start off an official visit combining ceremony with discussions on such critical issues as Afghanistan and the global economy. Photographer: Andrew Harrer/Bloomberg via Getty Images
Getty Images

Bloomberg Bloomberg