As the world continues to speculate about what exactly Israel hit in Syria on September 6, here’s some evidence of what Syria has been up to with its big buddy Iran:

Proof of cooperation between Iran and Syria in the proliferation and development of weapons of mass destruction was brought to light Monday in a Jane’s Magazine report that dozens of Iranian engineers and 15 Syrian officers were killed in a July 23 accident in Syria. According to the report, cited by Channel 10, the joint Syrian-Iranian team was attempting to mount a chemical warhead on a scud missile when the explosion occurred, spreading lethal chemical agents, including sarin nerve gas and VX gas. The factory was created specifically for the purposes of altering ballistic missiles to carry chemical payloads, the magazine report claimed.