It's a stretch of terminology to call neutron capture "fusion". This would make all (non-spontaneous) fission "fusion" too. Neutron capture is trivial to accomplish; there's no Coulomb barrier, as neutrons are uncharged. What's nontrivial, and an extraordinary-claim-demanding-extraordinary-evidence, is the production of free neutrons.

They don't have extraordinary evidence, or any evidence. Apparently I'm supposed be enthused about this future experiment, the outcome of which could be extraordinary, although there's no particular prior expectation for this.