The Trump administration signed a nuclear agreement with Saudi Arabia this afternoon that could lead the country to enrich its own fuel for nuclear reactors. It’s a deal that Mohammed bin Salman, the Saudi crown prince, has been trying to secure for several years.

The agreement further strengthens U.S.-Saudi political ties. And, as our White House correspondent David Sanger told our sister newsletter The World, “it’s a huge business deal for the U.S. because the agreement requires that the Saudis use American-sourced nuclear technology.” The deal is expected to last 30 years and would exclude other countries from involvement in the kingdom’s nuclear industry.

The agreement will require review by Congress, where it is likely to receive support from many Republicans. But some U.S. lawmakers — along with Israeli officials — have raised fears that the Saudis could use a civilian nuclear project to eventually develop nuclear weapons.

The U.S. has dozens of similar agreements with governments around the world. But in order to get this deal done, American officials agreed to terms that may limit the ability for international inspectors to evaluate Saudi Arabia’s nuclear program.