U.S. government officials say that the diplomatic leaks have already had an effect on relationships with individuals and governments around the world.
"We have gotten indications that there is at least some change in how individuals and governments cooperate with us, and share information," said Pentagon spokesman Col. Dave Lapan, without providing any details. There's a vague "sense that there has been some pulling back because of these revelations."
Speaking a press conference Monday, Secretary of State Hillary Clinton said the leak could "create potential dangers for our friends and partners."
In a February 2009 cable, American envoys were asked to identify sensitive places "whose loss could critically impact the public health, economic security, and/or national and homeland security of the United States."
Clinton said she would not comment on "any specific cable," but said the theft of the cables was "deeply distressing."
Clinton then called on "countries around the world and businesses to assist us in preventing any of the consequences that could either endanger individuals or other interests internationally."