NEW YORK — Citigroup Inc. chief executive Vikram Pandit shuffled his management team's organization on Tuesday and in a speech to investors praised U.S. government officials for their efforts to restore viability to the U.S. banking system.

In a memo to employees Tuesday, and later in a speech at the Waldorf-Astoria Hotel in New York, Pandit said that Mike Corbat will assume the role of interim CEO of Citi Holdings, the newly created division into which Citi plans to segregate its peripheral or ailing businesses and assets.

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