90,000+: liters of jet fuel combusted in the World Trade Center attack
"Because of the toxins in the air, we were reluctant to return. We were told the air was safe to breathe - clearly, it wasn't." - Catherine Hughes, downtown resident.
Jet fuel exacerbated the dust cloud - which scientists say was as caustic as Drano - leading to a wide range of cancers and symptoms in responders and residents.