bowe bergdahl's father, bob. >>> visiting turkey in an effort to boost ties between the two countries. zena hodar has more from ankara. >>> former iranian presidents have visited turkey. they visited istanbul. the focus is on boosting trade. these neighbors need each other. they need each other's markets. turkey needs iran for natural gas and oil. it reliance on importing this natural resource. sanctions have been able to skirt those sanctions l he paying for oil and natural gas using gold. now that has upset the u.s. government but for turkey there is no going back. they need this project.