They were using it to support a legitimate nuclear energy and radiotheraputics industry. They are in the part of the planet that will be most impacted by climate warming, so nuclear is critical for them to support baseline power needs.
The United States striking these sites throws the entire international system of non-proliferation into question. If there is no commitment any country can make to any system of governance that allows for peaceful development of nuclear energy, there is no controlling nuclear weapons development and proliferation.
Nowhere in this CNN brief are we informed about whether the sites were or were not used for weapons development. If we take the lessons of mainstream media's coverage of the Iraq war, it is likely CNN is stating this because their owners have been told that it would be better for their bottom line to manufacture consent for a second round of strikes than to preserve the President's assertion that the strikes were successful.