U.S. President Barack Obama has met privately in Warsaw with Ukraine's President-elect Petro Poroshenko in a show of support for Kyiv amid a separatist insurgency in the east.
The meeting on June 4 came a day after Obama pledged to spend $1 billion to send more U.S. military to Europe on a temporary basis.
Obama is also due to deliver a major speech to highlight the 25th anniversary of Poland's first free elections.
He is expected to say that Poland's experience can serve as an example for Ukraine.
On June 3 in Warsaw, Obama pledged to spend $1 billion to send more U.S. military to Europe on a temporary basis.
Meanwhile, NATO Secretary General Anders Fogh Rasmussen announced on June 3 at a NATO meeting in Brussels that the military alliance will finalize by the end of June a package aimed at modernizing and reforming Ukraine’s armed forces.