Russia says it is upgrading a destroyer and a nuclear-powered guided-missile submarine assigned to its Pacific Fleet so that they will be able to launch the shadowy 3M22 Zircon hypersonic cruise missile, also written Tsirkon, when that weapon becomes available. This comes a month after Russian President Vladimir Putin declared that a new corvette due to enter service soon would also eventually receive this capability, as the Kremlin’s public plans to field these missiles expand beyond the Kirov-class battlecruisers, which previous reports have indicated will be the first operational launch platforms.