The first witnesses for the Hutton Inquiry have been named. Below is a brief guide to their background as the inquiry begins its task of shedding light into the death of the scientist, Dr David Kelly.
Terence Taylor: the Institute for Strategic Studies in Washington
He is the first witness to appear before the Hutton Inquiry. He was a friend of Dr Kelly's and was also a fellow UN weapons inspector. Currently he is in charge of the International Institute for Strategic Studies, a think tank. He also wrote an obituary for Dr Kelly for the Independent newspaper.
Richard Hatfield: Ministry of Defence
As personnel director of the Ministry of Defence, Mr Hatfield would have been ultimately responsible for Dr Kelly in the workplace, as the scientist was working for his department.
Martin Howard: Ministry of Defence
Mr Howard is the deputy chief of Defence Intelligence, a job heavily involved in all the processes surrounding intelligence material.
Brian Wells: Ministry of Defence
The details of, and the level of threat posed by, chemical and biological weapons is a key part of Mr Well's work as the director of the Counter Proliferation and Arms Control secretariat.
Julian Miller: Cabinet Office
A senior official in the Cabinet Office's Intelligence and Security Secretariat. This department worked on the production of the government dossier about the threat posed by Iraq's alleged weapons of mass destruction.
Patrick Lamb: Foreign Office
The deputy head of the Foreign Office's counter proliferation department, Mr Lamb had known Dr Kelly for some time. His department oversees issues relating to weapons of mass destruction and as such Mr Lamb was Dr Kelly's main point of contact in the Foreign Office.
John Williams: Foreign Office
He is the press secretary for Foreign Secretary Jack Straw and is
the head of the press department at the Foreign Office. His appearance before the inquiry is likely to focus on the media advice and help with arrangements the Foreign Office made when Dr Kelly spoke to documentary makers.
Andrew Gilligan: BBC journalist
It was his radio report back in May which started the whole row between the BBC and the government over whether it had "sexed up" its intelligence dossier on Iraq. Dr David Kelly was the source for this story, but this was not revealed by the BBC until after his death. Lord Hutton will want to know the detail of how Andrew Gilligan put together his report for Radio 4's Today programme.
Susan Watts: BBC journalist
She is the science editor of BBC Two's Newsnight programme. Susan Watts produced two reports in early June which looked into the way the government's dossier on Iraq had been created. She spoke to David Kelly on the issue, and there is a tape recording of a conversation between them.
Gavin Hewitt: BBC journalist
On the same day that Andrew Gilligan's radio report was broadcast on the Iraq dossier, Gavin Hewitt reported the story for the BBC's 10 O'clock news. He too spoke to David Kelly and reported his source as saying that "some spin from Number 10 did come into play".
Richard Sambrook: Director of BBC News
It was Mr Sambrook who publicly acknowledged that Dr David Kelly was the source for Andrew Gilligan's story on the Iraq dossier. Mr Sambrook also stood by the story when under pressure from the government over it. Details of how he made key decisions on the issue are likely to form the basis of his questioning by the inquiry.