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Royal Bank of Scotland's former investment bank head John Hourican recently told the U.K. Parliamentary Commission on Banking Standards he was "very sorry [the Libor scandal] happened on our watch." Hourican, who resigned as part of the bank's $612 million settlement with U.K. and U.S. regulators, is the latest in a long line of executives to express regret over bank misdeeds. (Note: Some more closely resemble actual apologies than others.) (Image: Bloomberg News)