I'd like to think we wouldn't have. But yes, I remember Reagan. Pulling out was a mistake and shelling the hills instead of the terrorist camps was a mistake too. There has been a combination of errors that led up to 9/11. And it included Carter's handling of Iran, Reagan's handling of Lebanon, Bush Sr's failure to remove Saddam the first time and Clinton's failure to respond to the first WTC bombing, the OKC bombing, the TWA flight bombing, and opportunities to catch Bin Laden.
Reagan's blasting of Libya and Bush Sr's driving Iraq out of Kuwait were the only bright spots.