HARI SREENIVASAN:

Rex Tillerson has said that Ukraine is the single most difficult obstacle to establishing normal relations with Russia. And just a few weeks ago, the Trump administration decided to provide additional assistance to Ukraine in the form of lethal anti-tank missiles as they fight against Russian-backed separatists.

NewsHour Weekend Special correspondent Christopher Livesay traveled to Ukraine to see how that conflict continues to impact residents caught in the crossfire.