I didn't understand at the end when they said stolen plutonium came from some reactor in Georgia, the USA. Remember, there was some analysis of the nuclear material after it went off, and they could tell where the plutonium originated. I thought the bomb was Hebrew.
After researching atomic weapons and how they work out of curiousity, and physics, the movie showed no actual events from a actual detonation. After these weapons were used against people, the horrific nature is forbidden to be depicted. Most people just think it's a huge explosion. It's not.
The Day After - was realistic for a scenario of all out nuclear war. There were several scenes where it depicted mammals being vaporized, but did not try to attempt to try to depict the blast.
Terminator II - did an acurate depiction of the decinergration, but the blast wave would have been worse. They did a descent job of showing a blast wave from afar.
Out of fear, no one would ever dare to acurately show what happened in Hiroshima and Nagasaki, when those cities had a 20 kiloton device detonated 500 M above them. Sum of all Fears was a ground burst, so few would have suffered from thermal radiation burns.
If a terrorist group launched air burst atomic detonations in AMerica, we would never be the same. In Sum of all Fear it was a Nazi terrorist. The terrorists wanted the US and Russia to fight. But if Al-Quida or whoever launched missiles against American cities, we would have to listen and things would change.
Here is what the 4th nuclear detonation looked like. The first was a test in NewMexico, then Hioshima, then Nagasaki, then this detonation in the south Pacific of another Nagasaki-type bomb. This bomb was made in 1945