A bus with the Cuban and U.S. flags is seen on a beach in Havana, earlier this month. The White House is exploring regulatory changes to provide new opportunities for American citizens and U.S. businesses in Cuba. Yamil Lage/AFP/Getty Images hide caption

itoggle caption Yamil Lage/AFP/Getty Images

Bekele Gerba visited Washington, D.C., to bring his concerns about Ethiopia to the State Department. The photo was taken when he came to NPR for a radio interview. Mahafreen H. Mistry/NPR hide caption

itoggle caption Mahafreen H. Mistry/NPR

American tourists, like these visitors taking a guided tour in May, still have to provide one of 12 authorized reasons — such as visiting family or engaging in humanitarian work — for travel to Cuba. Desmond Boylan/AP hide caption

itoggle caption Desmond Boylan/AP

An International Atomic Energy Agency inspector cuts a uranium enrichment connection at Iran's Natanz facility, 200 miles south of Tehran, in 2014. This week's nuclear deal gives the IAEA up to 150 inspectors to monitor Iran for compliance. Kazem Ghane/AP hide caption

itoggle caption Kazem Ghane/AP