The terrorist attacks in Paris on Friday could be an early harbinger of a new, more professional kind of terrorist attack leveled against the West.
In the past, al-Qaida depended on violent jihadis showing up in Pakistan or Yemen with a passport or visa that would allow them to return to home. The group would train them and send them back. Counter-terrorism officials are concerned that ISIS has taken that a step further by sending battle-hardened fighters to do their dirty work.
Al-Qaida, for example, had developed a six-week training program for potential terrorists.