Jim Mattis, in Ukraine, says U.S. is thinking of sending weapons, vows to help the country stand up to Russia – The New York Times
US to boost Ukrainian army and retain Russia sanctions until it stops supporting rebels and returns Crimea, Mattis says in Kiev – Daily Sabah
VIDEO: Press conference of Ukraine President Poroshenko and State Secretary Mattis – YouTube
TRANSCRIPT: Secretary Mattis joint press conference with Ukrainian President Poroshenko – U.S. Department of Defense
McCain renews calls for Trump to send weapons to Ukraine – TheHill
Opinion: For the U.S. arming Ukraine could be a deadly mistake, it is walking into a proxy war with Moscow — one that it is unprepared to win – The New York Times
Survey among experts on Ukraine: Does providing lethal weapons to Kiev serve US vital interests? – Russia Matters
USS Porter enters Black Sea to strengthen NATO defenses – Stripes
Russia to respond to possible US increase of military presence in Ukraine – Sputnik International