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Allies weigh defense options amid concerns over a fraying U.S. nuclear umbrella
CNBC World says the shift toward more self-reliance on defense and weaker arms-control commitments is raising proliferation concerns.
As countries take more responsibility for their own defense, concerns are growing that the U.S. nuclear umbrella may no longer provide the same level of assurance, increasing pressure on allies to consider alternative defense arrangements, CNBC World reports.
The outlet links the concern to nuclear states stepping back from arms-control commitments, a dynamic that is prompting renewed attention to the risks of proliferation.
CNBC World frames the issue as a potential proliferation cascade, driven by allies reassessing security needs as the international arms-control environment changes.