The Iran bomb is an implosion nuclear device. According to the Times, “Weapons based on the principle of implosion are considered advanced models compared with the simple gun-type bomb that the United States dropped on Hiroshima. They use a blast wave from a sphere of conventional explosives to compress a ball of bomb fuel into a supercritical mass, starting the atomic chain reaction and progressing to the fiery blast. Implosion designs, compact by nature, are considered necessary for making nuclear warheads small and powerful enough to fit atop a missile.”
And, not good new for peace lovers here in the United States, Iran already has available a missile delivery system to carry the thing into Eastern Europe, where the Obama administration has just reneged on a plan to provide Poland, among other nations, with a missile defense system against just such an eventuality.