US President Barack Obama (R) and Turkey's Prime Minister Recep Tayyip Erdogan (L) talk at a bilateral meeting on the second day of the NATO 2014 Summit at the Celtic Manor Resort in Newport, South Wales.

US President Barack Obama (R) and Turkey's Prime Minister Recep Tayyip Erdogan (L) pose for a photograph at a bilateral meeting on the second day of the NATO 2014 Summit at the Celtic Manor Resort in Newport, South Wales.

US President Barack Obama (R) and Turkey's Prime Minister Recep Tayyip Erdogan (L) talk at a bilateral meeting on the second day of the NATO 2014 Summit at the Celtic Manor Resort in Newport, South Wales.

US President Barack Obama (R) and Turkey's Prime Minister Recep Tayyip Erdogan (L) shake hands during a bilateral meeting on the second day of the NATO 2014 Summit at the Celtic Manor Resort in Newport, South Wales.