Today I was playing again the ending of Win, I noticed that in the airport there are some guys with guns and a cap with the "ION" word written (probably they are a kind of PMC). Is not the first time that i see that cap, I saw it while I was exploring near the northern coast in bomos exploration, on a dead guy near a wreck of a ship and close to a CTRG crate, so my question is: what's they're role in the campaign?