If Jack Bauer can do it...
"Gee, wouldn't it be GREAT if the United States could create a way to set all Iran's bombs off at the same moment?
If Jack Bauer can do it..."
Why don't we sell Iran some old nuke bombs on the black market (of course they would not know it was from the US), and have hidden triggers in them and detonate them when they get to Iran ...
And ... who is Jack Bauer???