Bill Nye on 9/11 Cover-Up: Unclear

The claim: Elements of the US government planned or knowingly allowed the 9/11 attacks.

2018-09-11: “Today we keep those we lost on 9/11 in our hearts and minds. We are grateful for the first responders and to the families and citizens around the globe affected by these senseless acts. Let’s remember that we have more in common than we have differences. Let’s get to work.” source
2019-09-11: “An infamous day. We carry the memory and the resolve. One day people everywhere will embrace our common ancestry and kinship. In this meantime, we also thank our military and clandestine services working to keep us safe.” source