The World

China's president gets ready to meet President Trump. Also, the history and aftermath of one immigration raid. Plus, a tour of one of the world's largest refugee camps.

A suspected poison gas attack in Syria leaves dozens dead. Also, a personal journey through the once-secret nuclear research facility in Oak Ridge, Tennessee. Plus, the music of Venezuela's La Vida Boheme.

Today's top story is the deadly blast that tore through a subway car in St. Petersburg, Russia. Also, President Trump gives his backing to Egyptian strongman Abdel Fattah al-Sisi. Plus, three blind Korean fans who started their own baseball podcast.

Tucson says it's "immigrant friendly," but not a "sanctuary city." Plus, why US farmers are reaching out to Ukrainian hackers in a bid to fix their John Deere tractors. And, the underground railroad that ran south to Mexico.

Britain formally begins the process of leaving the European Union. Also, the elusive ISIS leader who supposedly ran sleeper cells inside Iraq. Plus, chef Eric Ripert talks about everything from climate change to veganism, and his commitment to Buddhism.

President Donald Trump says rolling back the Clean Power Plan will preserve coal jobs. Also, Hungary detains migrants in shipping containers. Plus, why one Mexican company is bidding to help Trump build his wall.

Hundreds arrested after big anti-corruption protests in Russia. Also, why famines are about more than just the lack of food. Plus, how San Francisco's version of universal health care covers undocumented immigrants.

Reaction from Cairo on the release from detention of Egypt's former long-term dictator, Hosni Mubarak. Also, an Israeli-American teenager is the prime suspect in a recent wave of bomb threats made against Jewish community centers in the US. Plus, a film that's become a cultural touchstone for many Latinos in the US.

How groups like ISIS seek to influence so-called "lone wolf" attackers. Plus, life in Cuba, post-Fidel. And, a conversation with a British citizen who recently won a contest for a seat on a commercial space flight ... but isn't really sure he wants to go.

A deadly attack today in central London caused the Houses of Parliament to go into a security lockdown. Also, the increasingly dark view of Russia in Washington. And, Egyptian satirist Bassem Youssef, in exile in the US, is trying to jump-start his career in a very different environment.