Trader Tom Hayes arrives at Southwark Crown Court, in London, Wednesday, May 27, 2015. A British prosecutor says the former Citibank and UBS trader served as the ringmaster in the alleged manipulation of a key interest rate, the London Interbank Lending Rate, or Libor. The charges against trader Tom Hayes, who specialized in products pegged to yen-denominated Libor, relate to the period from August 2006 to September 2010. He is charged with conspiring with employees from other leading institutions. (AP Photo/Tim Ireland)