On the day after 9/11 Trump gave an interview about the attack:
“40 Wall Street,” he said, referring to his 71-story building blocks away from the now-collapsed twin towers, “actually was the second-tallest building in downtown Manhattan, and it was actually, before the World Trade Center, was the tallest—and then, when they built the World Trade Center, it became known as the second-tallest. And now it’s the tallest.”
And this from the first week:
In an article from the New York Post dated September 18th, 2001, Trump said of the towers: to be blunt, they were not "great' buildings ... They only became great upon their demise last Tuesday.
This story from last year: