This actually makes sense because in the meantime Meta is ditching the open-source (open-weights) direction.
Before the national security narrative took over, the main argument was about "safe" AI, where releasing models as open weights was considered "not safe." Now that no major US AI players release premium open-weights models, the "safety" narrative isn't needed anymore—so cooperating with the US military is feasible again.
Hopefully we'll be lucky and brave patriots will take great risk occasionally leaking those models so we taxpayers can enjoy them too (not just Northrop-Martin).
Before the national security narrative took over, the main argument was about "safe" AI, where releasing models as open weights was considered "not safe." Now that no major US AI players release premium open-weights models, the "safety" narrative isn't needed anymore—so cooperating with the US military is feasible again.