It's impossible for them to be secretly doing anything productive without uranium and the IAEA have the uranium under constant surveillance. Without the uranium, there's no way to make a bomb. It's also really difficult to do anything regarding nuclear production secretly when you've got weapons inspectors and satellites watching everything. Nuclear facilities are big things, you can't just build one without people noticing. And if they ever decided to use that uranium to build a bomb they'd have to kick the inspectors out like North Korea did, giving us six months' notice at the minimum, assuming they don't hit technical problems. And that's six months to build an untested bomb with no delivery system. The whole thing is just sensationalism.