@ ubiquitin,
Actually the sanctions are what brought Iran to the bargaining table.
Obama stalled and stalled Congress to get them in place, and they were hard to get in place to discard them for a hope and a prayer is very misplaced.
More sanctions can make the Iranian economy even more insecure and stimulate people to rebel against their tyrannical leadership.
Actually, Daniel Pipes was addressing options (they were for Israel but could apply to international efforts, as well) and his second option was for sabotage against the program, both viruses like Stuxnet and other physical acts of sabotage.
If they wanted to thwart the bomb, they could, unfortunately their greed for trade with iran blinds them, and well Obama, what his plan?
It’s good to have the threat of military attack on the table but to keep them guessing.