Five years have gone by since President Obama signed the nuclear treaty with then-Russian President Dmitry Medvedev. Long after negotiations reached their end, the deal's merits still provoke debate.
The two leaders met on the sidelines of the gathering in Panama City. It was the first substantive meeting between leaders of the U.S. and Cuba in more than five decades.
Sens. Rand Paul and Ted Cruz have announced they'll run for president, and Hillary Clinton is expected to announce on Sunday. Correspondents Mara Liasson and Don Gonyea join NPR's Tamara Keith.
The scale of China's construction in the South China Sea's Spratly Islands is clear in new satellite images released by the Asia Maritime Transparency Initiative, whose director speaks with NPR.
A measure that would require more children to get vaccinated is moving ahead in the California Legislature. Though the state saw a large measles outbreak this year, final passage may be tough.