Big move by US as it arms submarines with nuclear cruise missiles, first time in 30 years; Iran, China, or Russia, who is the target?

The US has decided to arm its submarines with nuclear-armed cruise missiles after a gap of nearly three decades. The US Navy has issued a Request for Information (RFI) for a Sea-Launched Nuclear Cruise Missile (SLCM-N) in a bid to create a flexible cruise missile system.