The hard truth is that the United States now has few good options for containing Iran’s nuclear program. It can persist with the no-deal status quo, allowing Iran to continue inching closer to a bomb while suffering under sanctions. It can pursue a return to the 2015 agreement and then attempt to get Iran to agree to a “longer and stronger” pact, as the Biden team has suggested. It can try for various other deals, either more or less stringent than the 2015 agreement. Or it can attempt to destroy Iran’s nuclear infrastructure with a military strike, possibly setting Tehran’s progress toward a bomb back by a few years but almost certainly provoking retaliation and possibly a sprint toward the nuclear finish line.

Following the recent Biden administration announcement that the U.S. would join European nations in seeking to restore the 2015 Iran nuclear deal, we asked several of our Iran experts for their thoughts on the next steps: What should the U.S. goal be for a renewed Iran deal and what suggestions do you have for getting there? Matthew Bunn, Mahsa Rouhi, Sahar Nowrouzzadeh, and William Tobey shared their thoughts.

More than 70 nuclear nonproliferation specialists, including Matthew Bunn, signed a statement in support of U.S. reentry into the Iran Nuclear Deal.

Neither the United States nor Iran wants to go to war. That’s the good news. The bad news is that in the fog of crisis — similar in many ways to the fog of war — the danger of inadvertently stumbling into war is dangerously high.

In a dangerous world, every US use of military force should be backed up by a careful calculation of risks and a strategy to cope with the adversary’s response. Neither risk-balancing nor strategy is apparent in President Trump’s decision to kill Major General Qassem Soleimani, leader of the Quds Force of Iran’s Revolutionary Guard. With that killing — and Iran’s announcement it would exact a “harsh revenge” — there is a real danger the Middle East will slide even further into the fires of war.

Right now, everything both sides do to strengthen their defenses looks to the other side like preparation for attack.

In mid-January, a team of scholars from the Belfer Center’s Intelligence and Managing the Atom Projects traveled to Tel Aviv, Israel to examine samples of, and receive briefings on, an archive of documents related to Iran’s nuclear weapons program. The large cache includes some 55,000 pages of documents and a further 55,000 files on CDs that included photos and videos. A clandestine Israeli intelligence operation spirited the materials out of Iran in early 2018.

The documents that the Belfer group were shown confirm that senior Iranian officials had decided in the late 1990s to actually manufacture nuclear weapons and carry out an underground nuclear test; that Iran’s program to do so made more technical progress than had previously been understood; and that Iran had help from quite a number of foreign scientists, and access to several foreign nuclear weapon designs. The archive also leaves open a wide range of questions, including what plan, if any, Iran has had with respect to nuclear weapons in the nearly 16 years since Iran’s government ordered a halt to most of the program in late 2003. 

This brief report summarizes the group’s conclusions about what the archive reveals about Iran’s program and questions that remain open.