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Test results "determined there were no chemical warfare agents present in the munitions fired toward the Qayyarah-West Airfield, Iraq, Sept 20, 2016," according to the US military command in Baghdad

Test results "determined there were no chemical warfare agents present in the munitions fired toward the Qayyarah-West Airfield, Iraq, Sept 20, 2016," according to the US military command in Baghdad (AFP Photo/Mahmud Saleh)

Iraq War

President Obama announced on Oct. 21 that the United States is pulling all its troop from Iraq by the end of the year. (ABC News)