A nightmarish scenario of a terrorist group getting its hands on a nuclear device and smuggling it into a major city is the focus of CNN’s latest documentary.

Nuclear Terror airs on 18 September at 5:30 pm and on 19 September at 9:30 am and 4:30 pm. The hour-long documentary asks and answers a number of questions: How would a terrorist group go about obtaining nuclear materials? Where would it purchase materials, and how might it make the transaction? If the terrorists did build a bomb, could they really smuggle a nuclear device into the US?

Three years after 9/11, Nuclear Terror brings together a team of CNN correspondents, including senior Asia correspondent Mike Chinoy, US National Security correspondent David Ensor and Moscow bureau chief Jill Dougherty to investigate whether the threat of nuclear terrorism has escalated.

Chinoy, who has covered North Korea extensively on his travels since 1989, analyses whether Kim Jong Il’s regime would, for the 'right' price, strike a deal on the world’s shadowy black market and sell the enriched uranium that it has started producing again.

CNN US correspondent David Mattingly asks whether the nuclear nightmare can be averted. The Bush administration says it has made the problem a priority and taken steps to turn back the nuclear terror threat. However, critics claim that Washington has not done nearly enough.