The offices of the Carlyle Group are on Pennsylvania Avenue in Washington DC, midway between the White House and the Capitol building. The address reflects Carlyle's position at the very centre of the Washington establishment. For 14 years now, with almost no publicity, the company has been signing up an impressive list of former politicians - including the first President Bush and his secretary of state, James Baker; John Major; one-time World Bank treasurer Afsaneh Masheyekhi and several south-east Asian powerbrokers - and using their contacts and influence to promote the group. But since the start of the war on terrorism", the firm - unofficially valued at $3.5bn - has ... become the thread which indirectly links American military policy in Afghanistan to the personal financial fortunes of its celebrity employees, not least the current president's father. Among the firm's multi-million-dollar investors were members of the family of Osama bin Laden. "It should be a deep cause for concern that a closely held company like Carlyle can simultaneously have directors and advisers that are doing business and making money and also advising the president of the United States," says Peter Eisner, managing director of the Center for Public Integrity. "The problem comes when private business and public policy blend together. What hat is former president Bush wearing when he tells Crown Prince Abdullah not to worry about US policy in the Middle East?"