BERLIN (Reuters) – The Group of 20's credibility is at risk because it has been primarily equipped to deal with crises and is less effective during normal times, European Central Bank board member Joerg Asmussen said on Friday. Asmussen said that the group of industrialized and industrializing nations needed to be strengthened through reforms to make it more transparent, effective and binding in fighting crises. “The G20's promising start has unfortunately been followed by more mixed results,” Asmussen said in a speech. “There is no viable or obvious alternative to the G20. .. …