(CBS) In the aftermath of Sept. 11, President Bush ordered his then top anti-terrorism adviser to look for a link between Iraq and the attacks, despite being told there didn't seem to be one. The charge comes from the advisor, Richard Clarke, in an interview airing Sunday at 7 p.m. ET/PT on 60 Minutes. (...) After the president returned to the White House on Sept. 11, he and his top advisers, including Clarke, began holding meetings about how to respond and retaliate. As Clarke writes in his book, he expected the administration to focus its military response on Osama bin Laden and al Qaeda. He says he was surprised that the talk quickly turned to Iraq. "Rumsfeld was saying that we needed to bomb Iraq," Clarke said to Stahl. "And we all said ... no, no. Al-Qaeda is in Afghanistan. We need to bomb Afghanistan. And Rumsfeld said there aren't any good targets in Afghanistan. And there are lots of good targets in Iraq. I said, 'Well, there are lots of good targets in lots of places, but Iraq had nothing to do with it. "Initially, I thought when he said, 'There aren't enough targets in-- in Afghanistan,' I thought he was joking.