Iran announces its Arak heavy water plant will soon be operational
The announcement came from Dep Dir of Iran’s nuclear program Mohammad Saidi hours before Tehran’s promised response to the world powers’ incentive package for halting uranium enrichment. According to an unnamed source in Vienna talking to AKI, new centrifuges have been installed at the Natanz uranium enrichment facility over the past week. The Arak plant could produce plutonium for nuclear bombs by an alternative method to the uranium enrichment process
I take it that they're going to reject the incentive package.
Sounds like a good first place to target.