...Was Lieberman right in his history? Do the evildoers really mount terrorist operations to test new presidents early in their terms? I put this question to Peter Bergen, a journalist who is an expert on al Qaeda and terrorism. (He's written two good books on al Qaeda.) Bergen replies:

"The planning cycle of these ops militate against the idea that they were planned to test the new president. 9/11 was on the drawing board in 1996 and serious planning began in 1999.

There is no doubt al Qaeda would like to test a new president with an attack but they also hoped to test President Bush in 2006 with the plan to blow up seven US and Canadian planes leaving the UK. Had it succeeded this would have been a 9/11 style event six year into Bush's two-term presidency.

Similarly, Ahmed Ressam arrived in the United States in December 1999 from Canada, planning to blow up LAX airport in the waning days of Clintons presidency. Luckily he was arrested, but the attack was supposed to take place in the final days of the Clinton presidency, not because of presidential politics but because that was when the plotters were ready. And also Xmas in LAX probably meant more potential victims..." LINK