Standing in front of an old steam locomotive at the California Railroad Museum in Sacramento, Calif., on Tuesday, Tom Unberg, chairman of the California High-Speed Rail Authority, discusses the system's 20-year, nearly $100 billion business plan. (Associated Press)

Standing in front of an old steam locomotive at the California Railroad Museum in Sacramento, Calif., on Tuesday, Tom Unberg, chairman of the California High-Speed Rail Authority, discusses the system's 20-year, nearly $100 billion business plan. (Associated Press)