Turmoil on Wall Street with the Dow down more than 2000 points at the low and market-wide circuit breakers being triggered to stem some of the selling. From the NYSE to the CME and the NASDAQ, we follow all the biggest moves.Plus, as an oil price war breaks out between Saudi Arabia and Russia, we’ll look at where oil goes from here, the impact on energy producers, and the geopolitical ramifications.And a former Fed board member on what bullets the Central Bank still has left.