The Isis has a very diverse staff consists of former military personnel and specialists coming from extreme Islamist Middle East Asia and Europe, as well as their acceded to the Caliphate, even non-experts who recruited through the known channels, pseudo-religious, after a brief training (three to six months depending on your needs) are placed in the ranks of the rebels; make an exact estimate of the number of members is currently impossible, however, we can assume a number that fluctuates between 28,000 and 40,000 men. 

The cat in the Islamic religion has always played a very important role being the favorite animal of the prophet Muhammad. The propaganda of the Caliphate then chose the cat to land in the net looking for new members who propose a motion more human and just creating a profile on twitter "Islamic State of the cat." This would seem an almost laughable attempt to flesh out the network to a massive campaign of rapprochement of new fighters and yet it works. 

Foley was not beheaded for what he did, not for his profession as a freelance journalist, not because he told the truth from the theaters of war.

From border crossings still controlled by pro-Russian in recent days have passed armored tanks and men (do not refer to the exact number because it would certainly be inaccurate) it is estimated, however - from confidential sources - for about 150 armored personnel carriers, thirty wagons and 1,200 armed men.