Absolutely, Progressive Collapse Analysis wasn't invented in Oct. 2001. As a civil engineering major, you've had to have seen it, or at least aspects of it even if the instructor called it something different. Analyzing a building's progressive collapse characteristics isn't new to building codes, either.
And yet the moonbats keep trying to tell us that "there is NO WAY" a building could have collapsed like that...um, do they think it's so hard to realize that when you overload such a structure the way it became overloaded, that it won't fall straight down?
I hadn't seen Structural Analysis textbooks since 1992, and I still knew what I was seeing...