In the mid-1990s, a feud between al-Bashir and al-Turabi began, mostly due to al-Turabi's links to Islamic fundamentalist groups, as well as allowing them to operate out of Sudan, even personally inviting Osama bin Laden to the country. The United States had listed Sudan as a state sponsor of terrorism since 1993, mostly due to al-Bashir and Hassan al-Turabi taking complete power in the early 1990s. U.S. firms have been barred from doing business in Sudan since 1997. In 1998, the Al-Shifa pharmaceutical factory in Khartoum was destroyed by a U.S. cruise missile strike because of its alleged production of chemical weapons and links to al-Qaeda. However the U.S. State Department Bureau of Intelligence and Research wrote a report in 1999 questioning the attack on the factory, suggesting that the connection to bin Laden was not accurate; James Risen reported in "The New York Times": "Now, the analysts renewed their doubts and told Assistant Secretary of State Phyllis Oakley that the C.I.A.'s evidence on which the attack was based was inadequate. Ms. Oakley asked them to double-check; perhaps there was some intelligence they had not yet seen. The answer came back quickly: There was no additional evidence. Ms. Oakley called a meeting of key aides and a consensus emerged: Contrary to what the Administration was saying, the case tying Al Shifa to Mr. bin Laden or to chemical weapons was weak."