text:  There's been an angry reaction from Russia to NATO's promise of more military assistance to Ukraine. The Kremlin warned of a response to the move at the NATO summit. A spokesman called it a very serious threat to Russia's national security. An appeal by the veteran Russian human rights campaigner Oleg Orlov against his two-and-a-half-year prison sentence has been rejected by a court in Moscow. Mr. Orlov, a bold critic of President Putin's war in Ukraine, was jailed in February.