By Jane O'Brien
BBC, Washington DC
Former World Bank chief Paul Wolfowitz has been appointed head of an influential panel advising the US government on arms control.
Mr Wolfowitz will deal with issues such as Iran's nuclear programme
Mr Wolfowitz was ousted from the Bank last year over a scandal involving payments to his girlfriend, who was also a bank employee at the time.
He has long been a controversial figure in US and international politics.
As the Pentagon's number two after Donald Rumsfeld, he was one of the leading architects of the war in Iraq.
Mr Wolfowitz's insider status at the White House made him many enemies at home and abroad.
After a stormy two-year tenure at the World Bank, he was forced to leave because he authorised a large compensation package for his girlfriend.
His departure was further clouded by claims that he had tarnished the bank's reputation and strained relations with other countries - particularly in Europe.
His return to government comes at a time when many key figures of the Bush administration are leaving.
The State Department has confirmed his appointment as chairman of the International Security Advisory Board which provides the department with independent advice on arms control and disarmament.
Mr Wolfowitz will report on a number of current sensitive issues such as nuclear deals with India and North Korea, and Iran's contentious nuclear programme.
He is currently a scholar at the American Enterprise Institute - a conservative think-tank in Washington DC.