Michael Hayden : Hayden will likely be most damaging leaker in American history . He says the large amount of information reveals how America collects much of its intelligence . The third great harm of Snowden 's efforts to date is the erosion of confidence in the ability of the United States to do anything discreetly or keep anything secret . Hayden says that economic rivals will use it to disadvantage American companies . He says other nations will doubt whether the U.S. can do anything in return .
Michael Hayden : Hayden will likely be most damaging leaker in American history . He says the large amount of information reveals how America collects much of its intelligence . Hayden says that economic rivals will use it to disadvantage American companies . He says other nations will doubt whether the U.S. can do anything in return .