As liquid nitrogen spills out and evaporates, Fuels SPECIALIST STAFF Sergeant William Murphy, USAF, 366th Air Expeditionary Group, Supply Squadron, transfers liquid nitrogen from a delivery truck into a portable storage facility at an air base in the Persian Gulf during Operation ENDURING FREEDOM. In response to the terrorist attacks on September 11, 2001 at the New York World Trade Center and the Pentagon, President George W. Bush initiated Operation ENDURING FREEDOM in support of the Global War on Terrorism (GWOT), fighting terrorism abroad