The US military responded this week to what it calls Russia's "unlawful and destabilizing actions" in Ukraine and elsewhere by pushing back against Moscow on the seas and in the air.
The US has begun making the necessary preparations to sail a warship into the Black Sea, a move that comes amid heightened tensions in the region following Russia's seizure of Ukrainian ships and detention of Ukrainian sailors.
The US Navy is ramping up its presence in the Black Sea as part of a bid to counter Russia's increased presence there, a US military official tells CNN.