Interesting;
Shingarkin said Russian suitcase nukes consisted of a bag measuring about 24 by 16 by 8 inches fitted with three coffee can-size aluminum canisters filled with plutonium or uranium. A 6-inch-long detonator is connected to the canisters, and a battery line keeps it powered during storage.
Hmph.
The description really isn't in line with either type of nuclear devices. These fall into two groups, 'gun' style, which are easy to make but crude and ineffcient; basicaly take one tube, seal of the end, tamp half-a-grapefruit sized chunk of certain fissile materials in the closed off end, and place an assembly which will smash the other half of the grapefruit into the fixed assembly in the closed end when you detonate the device.
The implosion type is complicated, as you wrap a hollow sphere of fissile matterial with shaped explosive charges that make it implode VERY precisely.
Either that description is deliberate rubbish, or very vauge, with 'filled' not meaning filled and 'detonator' meaning actuator, or something like that. Even then it clearly describe three unconnected elements that could be the 'tubes' of three seperate 'gun' style devices, but I can't say why you'd have three seperate elements when one would do.
He said the suitcase nukes have a lifespan of only one to three years because some of the materials, such as the battery and the conventional explosives that produce the charge that sets off the nuclear reaction, deteriorate over time and must be replaced. Otherwise, he said, they become radioactive scrap metal.
This is true, but actually, it might be a sanitised version of the truth. If they are fission-fusion-fission devices, he's refering to the 'fusion blanket' decaying, but in that case they wouldn;'t have 'three coffee cans in them'.
However, Digges cautioned that al Qaeda might have access to non-fissile radioactive material that could allow it to build so-called dirty bombs -- devices that combine conventional explosives and radioactive material. Although they would not produce a nuclear reaction, they would still create an enormous blast and long-lasting, but less widespread, radiation.
Analysts say large quantities of such radioactive material -- such as cobalt 60, iodine 131 and strontium 90 -- have disappeared from the former Soviet Union.
Yeah, dirty bombs are easy to make and there's more than enough radioactives floating around to make a severe dent in some cities property values...
As for getting them into a country... you can retro-fit a single engine Cessna so it can cross the Atlantic. Keep low and be lucky (wnna fly a fuel tank with a nuclear device on board) and you can get anything in without anyone knowing shit.