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The federal government is stepping up its deportation raids, though authorities say criminals are the priority. Still, the actions are sending a chill through the Central American immigrant community.

Zika disease has been on the rise in tropical countries like Brazil, where it's suspected of causing birth defects. Dr. Peter Hotez, dean of the National School of Tropical Medicine, explains more.

The Rev. Franklin Graham, an evangelical Christian leader, speaks with NPR's Michel Martin about his 50-state tour to rally conservative evangelical voters.

Sunday's Democratic debate was the last one before the Iowa caucuses. David Greene talks to Cokie Roberts and Margie Omero, a Democratic pollster from the firm Purple Strategies.

The inconsistencies of U.S. immigration policy is in focus in El Salvador. Two groups of migrants — Cubans and El Salvadorans — receive very different receptions at the U.S. border.

A non-profit organization in Berlin has invented a small portable transmitter that can download satellite signals and rebroadcast them on FM for Syrians to listen to on their car or household radios.

Kevin Bales' book, Blood and Earth, explains why slavery in the world's lawless zones is essential to operate mines that pose a grave threat to the environment.

With many sanctions against Iran lifted, businesses in the U.S. and Iran are gearing up to cash in. U.S. and Iranian business people gauge where they see things going.

An investigation into the killing in Britain of Alexander Litvinenko puts the blame on the Russian government. The British report says President Vladimir Putin likely approved the assassination.

Maurice White, the founder of Earth, Wind & Fire, has died at age 74. The horn-driven band was known for 1970s hits such as "Shining Star" and "September."