These are stored in most Israeli embassy’s for ease of deployment. The one’s used on 911 were kept at the Israeli consulate in NYC until put in place. After 911 the FBI now checks all diplomatic pouches with a Geiger counter before entering or leaving the US. The South African weapons were also surplus W-54 artillery shells acquired from Israeli and final assembly and testing was done in South Africa with Israel assistance. This was done because the Israelis needed a testing ground in order to make sure that there rebuilt weapons would work as designed.
The North Korean weapons are also of the 155 mm artillery design as provided by Israel. The true North Korean nuclear weapons program is based on nuclear artillery use and not missiles. The plan is to use a massive artillery barge on South Korea if war breaks out this include the use of small nuclear artillery shells to counter US tanks rockets and artillery. The Saudi’s also have a stash of W-54’s acquired from the US under Bush2. The Israelis have also provided them to India, Brazil, China, Taiwan, Japan, North and South Korea etc.
Demona is a standard 75 megawatt thermal open top reactor as used in France for there plutonium weapons production program. There version of Hanford. Due to over use as a fast breeder reactor by the Israelis, Demona suffered a “steam explosion” IE a flash over incident due to neutron criticality back in the late 1980’s under Bush 1. This shut down its operation for many years until repairs could be made. It now only operates at very low power levels due to neutron absorption damage to the containment vessel. Now mainly used for isotope production. This forced the Israelis to turn to stolen nuclear stockpiles from the US for the continuation of their nuclear program.
The Israelis knowing that the nuclear material that they had acquired only had a limited shelf life left before it was no longer usable as weapons grade then tried to dump it on the surplus market as fast as possible before it was of no use to them. So they dumped it on unsuspecting nations who would only sit on it and not be able to test it. These were the fissile tests in North Korea. When everybody caught on to the scam such as Japan and Korea. (IE the Korean sub sinkings etc) they were pissed etc…… because they paid big bucks for junk. This started a mini cold war with Israel and their pissed off clients.
However with micro nukes even as the plutonium ages it will still fissile producing a smaller size detonation well under 2 kiloton in size. So they can still be used as small dirty bombs or as very small tactical nukes such as the nuclear artillery strikes on Damascus with rocket assisted W-54’s……
On the W-54 pit design it is pill shaped and it is only about 4 inches in diameter and weighs about 24 pounds. Most of the fuel is consumed in the plasma fire ball when detonated so there is very little plutonium fallout left to escape. If it is salted with other materials the fallout can be even reduced to lower levels such as in an enhanced radiation device or the so called neutron bomb. This is what was used on 911.
The primary purpose of the nuclear weapon used on 911 was to produce a massive Gamma ray / neutron flux that would vaporize about 150 to 300 feet of 6 inch thick steel I beams that constituted the central core of the WTC buildings.
This created a free fall event as seen on TV that day. The flash would be hidden from sight due to the underground detonation. Most of the light was in the non visible light spectrum any way. Over pressure would be reduced to 6 psi due to the blast traveling up the central core and neutron radiation vaporizing the TV antenna at the top of the building as see on TV.
The fallout would be mainly vaporized concrete cement and iron oxide. This is why after 911 they told everyone on TV that the beta radiation burns that people were getting were due to the caustic cement dust and not due to the radiation effects from the radioactive cement fallout. The iron oxide found all over the place was what was left of the steel I beams. This was the so- called Nano Thermite that was found everywhere. Fallout was limited to a 1 mile area around down town NYC. (See charts.) Radiation decay was reduced to safe low levels after 72 hrs, outside of ground zero itself. This is why the area was blocked off from the public for 3 days after the event, in order to let the radiation drop to safe levels.