(AP) Federal antitrust regulators on Friday cleared Wells Fargo's $11.7 billion acquisition of Wachovia Corp., capping a weeklong battle for the Charlotte, N.C.-based bank. The rapid approval comes a day after Citigroup Inc. walked away from its own efforts to buy Wachovia - which experienced a $5 billion run on deposits in late September after the failure of west coast rival Washington Mutual Inc., according to court documents filed Friday by Citigroup. Late Thursday, Citigroup broke off talks with Wells Fargo and federal regulators after the suitors failed to reach an agreement over how to split up the bank. San...