The United States was catapulted into a worldwide diplomatic crisis today, with the leaking to the Guardian and other international media of more than 250,000 classified cables from its embassies, many sent as recently as February this year.
At the start of a series of daily extracts from the US embassy cables - many of which are designated "secret" – the Guardian can disclose that Arab leaders are privately urging an air strike on Iran and that US officials have been instructed to spy on the UN's leadership.
These two revelations alone would be likely to reverberate around the world. But the secret dispatches which were obtained by WikiLeaks, the whistlebowers' website, also reveal Washington's evaluation of many other highly sensitive international issues.
These include a major shift in relations between China and North Korea, Pakistan's growing instability and details of clandestine US efforts to combat al-Qaida in Yemen.
Among scores of other disclosures that are likely to cause uproar, the cables detail:
• Grave fears in Washington and London over the security of Pakistan's nuclear weapons programme
• Alleged links between the Russian government and organised crime.
• Devastating criticism of the UK's military operations in Afghanistan.
• Claims of inappropriate behaviour by a member of the British royal family.
The US has particularly intimate dealings with Britain, and some of the dispatches from the London embassy in Grosvenor Square will make uncomfortable reading in Whitehall and Westminster. They range from serious political criticisms of David Cameron to requests for specific intelligence about individual MPs.
The cache of cables contains specific allegations of corruption and against foreign leaders, as well as harsh criticism by US embassy staff of their host governments, from tiny islands in the Caribbean to China and Russia.
The material includes a reference to Vladimir Putin as an "alpha-dog", Hamid Karzai as being "driven by paranoia" and Angela Merkel allegedly "avoids risk and is rarely creative". There is also a comparison between Mahmoud Ahmadinejad and Adolf Hitler.
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Asked why such sensitive material was posted on a network accessible to thousands of government employees, the state department spokesman told the Guardian: "The 9/11 attacks and their aftermath revealed gaps in intra-governmental information sharing. Since the attacks of 9/11, the US government has taken significant steps to facilitate information sharing. These efforts were focused on giving diplomatic, military, law enforcement and intelligence specialists quicker and easier access to more data to more effectively do their jobs."
He added: "We have been taking aggressive action in recent weeks and months to enhance the security of our systems and to prevent the leak of information."
