>>2975262 (lb)
I remember the size and scale of the towers very well. The weekend before 9/11 I went to a concert in Liberty State Park, and took the ferry over from the WTC Marina. For the whole slow ride there and back, I just looked up at the sheer bulk of the towers. The tops were covered in fog.
Then, on Tuesday, they were reduced to almost nothing. Totally mind-blowing.