Tonight on Nightly Business Report, Federal Reserve Chairman Ben Bernanke gives his long-awaited press conference and gives the market a big hint as to the future of his stimulus program. NBR will ask Mark Zandi of Moody's Analytics what it means for the economy and Jim Paulsen of Wells Fargo what it means for the market and your investments. And, the American Medical Association classifies obesity as a disease - and it could have implications for doctors, patients, insurers and health care costs.