President Barack Obama and President Bronislaw Komorowski of Poland greet audience members during a U.S. aviation detachment F-16 event at Warsaw Chopin Airport in Warsaw, Poland, June 3, 2014.

President Barack Obama and President Bronislaw Komorowski of Poland greet audience members during a U.S. aviation detachment F-16 event at Warsaw Chopin Airport in Warsaw, Poland, June 3, 2014.