FILE - In this Aug. 1, 2004 file photo, a New York Police Officer stands guard outside the New York-based Citigroup Center on Lexington Avenue in New York. The FBI is investigating a hacker attack on Citigroup Inc. that led to the theft of tens of millions of dollars, The Wall Street Journal reported Tuesday, Dec. 22, 2009.
(AP Photo/Jennifer Szymaszek, file)