U.S. President Barack Obama is due in Poland later on May 27 on the last stop of his four-nation tour of Europe.
Obama will meet with leaders of Central and Eastern Europe who will also be in the Polish capital for a summit.
Obama's talks with Polish leaders are expected to focus on Poland's possible energy riches and defense issues.
A recent U.S. Energy Information Administration report said Poland has enough shale gas reserves to meet its energy needs for 300 years.
A possible deal to rotate some U.S. F-16 fighter jets to a Polish base is also expected to be discussed.
compiled from agency reports