An article titled 'Perfect Storm', attributed to captive British photojournalist John Cantlie, mentions a hypothetical operation in which the IS uses its billions of dollars to purchase a nuclear device "through weapon dealers with links to corrupt officials in the region".
"And if not a nuke, what about a few thousand tons of ammonium nitrate explosive? That's easy enough to make," the article further states.
It mentions how the nuclear device can be smuggled into the United States. [Why do Islamic fundamentalists hate anything old and beautiful]
The article states that 'perhaps such a scenario is far-fetched but it's the sum of all fears for Western intelligence agencies and it's infinitely more possible today than it was just one year ago'.
The article states, "perhaps such a scenario is far-fetched but it's the sum of all fears for Western intelligence agencies and it's infinitely more possible today than it was just one year ago".
"The Islamic State make no secret of the fact that they have every intention of attacking America on its home soil and they're not going to mince about with two mujahideen taking down a dozen casualties if it originates from the Caliphate. [Saudi Arabia mosque blast: Islamic State claims responsibility for suicide attack]
They'll be looking to do something big, something that would make any past operation look like a squirrel shoot, and the more groups that pledge allegiance the more possible it becomes to pull off something truly epic," the article further says.
It further states, "Remember, all of this has happened in less than a year. How more dangerous will be the lines of communication and supply a year on from today?"
"As the territory of the Islamic State crosses from one border to another like a wildfire that is burning out of control, it'll be only a matter of time before the Islamic State reaches the Western world," the article ends with a warning.
The article has been written by Cantile who is in ISIS captivity since his kidnap in 2012.