The shutdown of Russian gas transit through Ukrainian territory is one of Moscow's "most costly defeats," U.S. National Security Council spokesperson John Kirby said, as reported by Ukrinform on Jan.

The White House described Ukraine's suspension of Russian gas transit as one of the most expensive defeats for Moscow, costing it around US$6.5 billion in revenue each year. Source: John Kirby, White House National Security Communications Advisor,

The historic first marks a milestone in Washington’s bid to replace Russia as Europe’s top source of natural gas.