The United States has issued its formal response to Russia's demands over the crisis on the Ukraine border.
Among Russia's list of its concerns was a demand for NATO to rule out the possibility of Ukraine and others ever joining the alliance.
U.S. Secretary of State Antony Blinken said on Wednesday that Washington had made no concessions on its core principles.
[Clip: Blinken]
"The document we've delivered includes concerns of the United States and our allies and partners about Russia's actions that undermine security, a principled and pragmatic evaluation of the concerns that Russia has raised and our own proposals for areas where we may be able to find common ground. We make clear that there are core principles that we are committed to uphold and defend, including Ukraine's sovereignty and territorial integrity and the right of states to choose their own security arrangements and alliances."
