Mustard gas is awful, terrible, and downright vile. And even that feels like an understatement.
Which is why it's such a big deal that ISIS is suspected of launching a rocket or artillery shell filled with mustard agent on US and Iraqi forces in a military base just south of Mosul in Iraq on Wednesday, according to CNN.
Thankfully, no US troops were hurt and none of them are displaying the symptoms caused by mustard exposure.
What is mustard gas?
Mustard gas is a chemical warfare agent that forms large, painful blisters on the exposed skin and inside a victim's lungs. However, these blisters don't appear right away. Often times, it takes a while for such symptoms to manifest, meaning that people can be unaware of exactly how much mustard gas they were exposed to.
Exposure to such gas can oftentimes be fatal, as it causes bleeding within the respiratory system. It's slow and painful, taking a long time for a victim to completely succumb.
Check out this segment on mustard gas from YouTube channel Pick Your Poison.
One official said that the canister and the mustard agent were both "poorly weaponized" and "ineffective," reports CNN.
Troops have been through decontamination showers just in case. US troops are oftentimes outfitted with protective gear, just in case of chemical warfare.
The U.S. military continues to isolate and eliminate sites in which it believes ISIS is producing mustard gas.