Ali Akbar Salehi, top, the head of Iran's Atomic Energy Organization, delivers a speech as lawmakers and officials discuss a bill on Iran's nuclear deal in parliament on Sunday. The parliament approved an outline of a bill allowing the deal's implementation. Ebrahim Noroozi/AP hide caption

itoggle caption Ebrahim Noroozi/AP

Nazmiye Cakir, a 60-year-old "bird whistler," learned the whistled language from her grandparents, and still uses it. "The one thing you don't whistle about is your love talk," she says with a laugh, "because you'll get caught!" Gokce Saracoglu/for NPR hide caption

itoggle caption Gokce Saracoglu/for NPR

A refugee boy plays a violin as hundreds of migrants are blocked from marching down a highway toward Turkey's western border with Greece and Bulgaria on Saturday. Turkey has some 2 million refugees, mostly from Syria, but says they will not be allowed to settle permanently in the country. Emrah Gurel/AP hide caption

itoggle caption Emrah Gurel/AP

Selma Halik, holding her 2-year-old daughter Amara at a refugee camp on the Greek island of Lesbos, says much of her family was wiped out by ISIS. She doesn't want her daughter to see the things she's seen. Peter Kenyon/NPR hide caption

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Refugees and migrants on the Greek island of Lesbos enjoy the sea. Alkis Konstantinidis/Reuters/Landov hide caption

itoggle caption Alkis Konstantinidis/Reuters/Landov

Sakine Arat, right, and Mayrem Bulut are Kurdish mothers camping out between Turkish amry forces and the Kurdish PKK militants, in hopes of preventing clashes. "Mothers on both sides should be doing this," says Arat, 80. Peter Kenyon/NPR hide caption

itoggle caption Peter Kenyon/NPR