In previous years over 500 people from 36 countries (including Israel, Egypt, Iraq, Lebanon, Jordan, Saudi Arabia and South Vietnam) have been trained in the use of chemical and biological warfare at the USA army's Chemical School at Fort McClellan in Alabama.
The International Red Cross verified that USA-trained pilots from Egypt had dropped canisters of poison gas over Yemen in 1967. Over 150 villagers died after gagging, coughing and bleeding.