What exactly are chemical weapons, and why is the US anxious that Russia would use them

After over a month of fighting in Ukraine, the focus has shifted to Russia's probable use of chemical weapons in its invasion. Russia's baseless assertion that Ukraine possesses biological and chemical weapons, according to US President Joe Biden, suggests that Russia's President Vladimir Putin may use them in the coming days.

On March 21, Russia struck the Sumykhimprom chemical factory in Ukraine's Sumy region. It ca....