Iran could now produce “one bomb’s worth of fissile material” in “about 12 days,” a top US Defense Department official said Tuesday. Under Secretary of Defense for Policy Colin Kahl offered one of the most striking US government assessments to date of Iran’s “breakout time” as efforts to try to restore the Iran nuclear agreement remain halted and Tehran continues to breach the restrictions set out by the deal. Kahl said that “Iran’s nuclear progress since” the Trump administration withdrew the United States from the 2015 nuclear deal “has been remarkable.” “Back in 2018, when the previous administration decided to...