Even as Tehran signals an interest in nuclear talks, many experts have already envisioned what the world would look like if the country got nuclear weapons. It wouldn't be as dire as many fear, but it would unleash new uncertainties - and perhaps a regional arms race.
In past nuclear cooperation agreements, the US has required nations to commit to not enriching uranium and opening nuclear sites to inspections. The Obama administration has just done away with the requirement. Congress needs oversight to combat this possibility of nuclear proliferation.