Ukrainian President-elect Petro Poroshenko, left, and US President Barack Obama shake hands during a meeting in Warsaw, Poland, on June 4, 2014. (EPA/Jacek Turcyszk)
Ukrainian President-elect Petro Poroshenko, left, and US President Barack Obama shake hands during a meeting in Warsaw, Poland, on June 4, 2014. (EPA/Jacek Turcyszk)