Flight 77
9/11 Museum World Trade Center Evidence: No Plane Hit Pentagon?
“Absence of evidence is not evidence of absence”
Astronomer Carl Sagan was fond of saying this when talking about the possibility of intelligent life existing elsewhere in the universe. Former Defense Secretary Donald Rumsfeld also used the expression in his own portrayal of intelligent life on this planet, in reference to his inability to find Saddam Hussein’s WMDs (weapons of mass destruction) that didn’t exist.