Ukrainian soldiers prepare to fire at Russian positions from a U.S.-supplied M777 howitzer in Ukraine's eastern Donetsk region Saturday, June 18, 2022.

Video. Ukraine facing 'brutality' unseen in Europe since WW2, says NATO chief

Jens Stoltenberg says the NATO summit in Madrid will agree "a comprehensive programme of assistance" to help Ukraine "enforce its right to self-defence" against Russian aggression.