Persian nuke technology came through the US, not Russia.
Where is your evidence that the Russian nukes are “less secure?”
There have been zero incidents.
“Where is your evidence that the Russian nukes are “less secure?””
After the break up of the USSR America was trying to secure “loose nukes”. Remember?
Here is an article about why it is reasonable to fear that their cold war stuff isn’t secure.
http://www.cfr.org/weapons-of-terrorism/loose-nukes/p9549