A top U.K. law enforcement official says that a nuclear related attack by Islamic terrorists will take place:

A nuclear attack by terrorists causing widespread panic, chaos and death is inevitable and will happen soon, a senior Scottish police officer has warned.
Ian Dickinson, who leads the police response to chemical, biological and nuclear threats in Scotland, has painted the bleakest picture yet of the dangers the world now faces.
Efforts to prevent terrorist groups from obtaining materials that could be made into radioactive dirty bombs - or even crude nuclear explosives - are bound to fail, he said. And the result will be horror on an unprecedented scale.
"These materials are undoubtedly out there, and undoubtedly will end up in terrorists' hands, and undoubtedly will be used by terrorists some time soon," he declared. "We must plan for failure and prepare for absolute terror."
Dickinson is assistant chief constable with Lothian and Borders Police, and has responsibility through the Association of Chief Police Officers in Scotland for protecting Scotland from chemical and nuclear attacks. He has been closely involved in co-ordinating the country's counter-terrorism response.
He said: "An incident will continue for days and all the public will see is people dying without reason. What will we do when our children come home from school with blisters on their skin and their parents don't know what to do?
"What happens if 10 deaths, 50 deaths, 100 deaths start occurring in an unconnected and random way all over the country? The public will be rightly and understandably terrified.
Casualties caused by radiation, which most people don't understand, would trigger widespread "panic and fear", said Dickinson. And the response of the emergency services "would be chaotic" because of a shortage of resources."
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At least Chief Dickinson is leveling with the public which is more than can be said for counter-terrorism officials in the U.S.
Wide spread panic is less likely to occur IF the populace KNOWS what to expect.
Meanwhile in the Balkan area:

"Slovak and Hungarian police seized a kilo of radioactive material and arrested three people in a joint operation on Wednesday, a spokesman said.
Slovak police spokesman Martin Korch said the material was being examined and did not confirm a report carried by the Slovak news agency SITA that it was enriched uranium.
"This one kilogramme should have been sold for $1 million US dollars," spokesman Martin Korch said. The spokesman said the police raid took place along the eastern part of the two central European countries' common frontier, near their borders with Ukraine.
"Three people have been taken into custody, two in Slovakia one in Hungary," he said. "Further information will be provided tomorrow."
Uranium enrichment can yield either fuel for nuclear power stations, or be used for nuclear warheads."

Keep in mind that for every one time that someone is caught transporting nuclear material, there are probably 5 other incidents where it's transport to unknown staging areas is successful.
It's best to have a plan in place just in case the unthinkable occurs.
No one in New York City could have conceived of the events that shocked the world on 9-11.
The unthinkable is now probable.