A chemical weapons expert, who once worked for longtime dictator Saddam Hussain and was preparing to defend the biggest city in the ISIS with poison gas, has been killed in a US-led air strike in northern Iraq. Salih Jasim al-Sabawi alias Abu Malik was killed in an air strike near the ISIS-held city of Mosul on January 24, The Telegraph reported. Malik may have been tasked to prepare poison gas to hold Mosul, it said.