“The $1 billion security plan [is] intended to demonstrate the United States’ ‘rock-solid commitment’ to stand with Central and Eastern Europe against Russian aggression, but it did not settle nerves rattled by the crisis in neighboring Ukraine. Arriving here for the start of a four-day swing through Europe certain to be dominated by the continuing tension with Moscow, Mr. Obama announced a program to expand military training, joint exercises and troop rotations while prepositioning equipment in the region to bolster defenses for American allies. The president’s main goal here in Warsaw was to reassure NATO allies that once were in the Soviet orbit that they could count on American support.”
http://www.nytimes.com/2014/06/04/world/europe/obama-in-europe.html?hp&_r=1