I believe that it is God’s mighty hand that will continue to restrain the nuclear demon–and all other wickedness—until the Restrainer, the Holy Spirit who indwells believers in Christ—is removed when we are called into the clouds to be with Jesus for eternity.
“The coming of the lawless one is according to the working of Satan with all power, signs, and lying wonders, and with all unrighteous deception among those who perish, because they did not receive the love of the truth, that they might be saved. And for this reason God will send them strong delusion, that they should believe the lie, that they all may be condemned who did not believe the truth but had pleasure in unrighteousness.”( II Thessalonians 2:9-12)