In yet another fallout of the ongoing financial crisis, US banking giant Citigroup is buying the banking operations of Wachovia Corp. in a deal facilitated by the US government, the Federal Deposit Insurance Corp. (FDIC) has said. Citigroup, headed by India-born Vikram Pandit, Monday agreed to acquire Wachovia's banking operations for $2.1 billion in stock and will assume another $53 billion in Wachovia's debt. Wachovia was also in takeover talks with Wells Fargo, a diversified financial