Stephen Hadley -- the US deputy national security adviser who reports to Condoleezza Rice -- said he should have deleted a reference to claims that Iraq had tried to buy uranium in Africa from US President George Bush's State of the Union speech in January. The speech is believed to have inspired UK allegations that Iraqi ex-President Saddam Hussein tried to buy uranium for nuclear weapons from the West African state of Niger. "I should have recalled at the time of the State of the Union speech that there was controversy associated with the uranium issue," Hadley said. He added that he had apologised to the US president.