How ISIS Produced Its Cruel Arsenal on an Industrial Scale...NYT
..[ISIS]armaments programs grew out of the insurgencies fighting the American occupation of Iraq from 2003...
..when the Islamic State seized territory in Iraq and Syria...found that the warheads contained a crude blister agent..rocket-propelled grenade filled with blister agent..
..projectiles filled with caustic soda...in Manbij, Syria, in late 2016...“Caustic soda is extremely hazardous. It’ll burn your skin,” he said. “If you inhale it, it’ll cause death.”
[IED's made from]..dud American-made bombs dropped by coalition... unexploded American aircraft bombs
Sunni bomb makers also fielded chemical weapons, sometimes by combining explosive devices with chlorine, a toxic substance with legal applications, and other times in bombs made from degraded chemical rockets or shells left from Iraq’s defunct chemical warfare program.