When Reagan paid Khaddafi back for Lockerbie by some coincidence he did hit Benghazi itself, in addition to various locations in and around Tripoli, obviously.
The now-chastened Khaddafi calmed down and knowing the full wrath of US airpower, went on a decades-long MANPADS buying binge.
The US operators were acquiring, appraising, servicing and TRANSFERRING lots of MANPADS, in addition to other gear.
Agents are often binary, separated into TWO parts which are innocuous as long as they're separate.
The shell is fired and as it spins they MIX, making it lethal.
There is NO evidence the named shells were chem, but those questions should be asked.
Let's take a look at the typical size of something that shoots the 155 mm, shall we..?
That is not the typical "every day carry" type weapon, can we agree..? Sometimes the gun is towed, meaning no truck is included, but you can still see that were the shells fired from a gun that a small TEAM would at least be required.
My guess is the rebels were interested in the shells ONLY for their interesting ingredients, which they intended to adapt for their own applications.
I think they were CHEM shells.