Rather than backing down after last week's downing of a civilian passenger jet, Russia appears to be intervening more aggressively in the war in eastern Ukraine in what American and Ukrainian officials call a dangerous escalation that will almost certainly force more robust retaliation from the United States and Europe.
Russia's War Against Ukraine
New York Times: Russia steps up help for rebels in Ukraine war
A Russian-backed separatist stands next to bodies of Ukrainian crew members of a destroyed tank in the northern outskirts of Donetsk on July 22.
