"Is there a cover-up being perpetrated by the United States Government in regards to 9/11?"

If they say no, then you DRILL them with the obvious cover-ups. If they say yes, then respond with, "What do you have, a "Conspiracy Theory?"

Just to give you an idea of what some of the obvious cover-ups are:
  • Sibel Edmonds is the "most gagged person in American History."
  • 28 redacted pages in the Joint Congressional Inquiry.
  • The refusal to release the CIA Inspector General's report.
  • The 9/11 Commission's failure to address ALL of the family members' questions.

The "Debunkers" are not being honest in their critique of the movement. They deny the obvious cover-ups, and attack the movement for some of the theories promoted.

That means they have an OBVIOUS agenda.