Host Rachel Martin talks with Lester Reingold, a writer and Titanic enthusiast, just after he'll have attended a memorial honoring the 100-year anniversary of the Titanic's sinking from aboard a cruise ship, anchored right where the ship went down.

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We turn our attention now to Syria. United Nations observers are preparing to travel to Syria this week to start monitoring the fragile cease-fire between government forces and rebel fighters. The U.N. Security Council yesterday approved the deployment of a 30-member team. The monitors will have their work cut out for them. As NPR's Grant Clark reports from Beirut, military bombardment is reportedly continuing, despite an agreed truce.

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To Istanbul now, where negotiators for Iran and six world powers say yesterday's talks on Iran's nuclear program represent a constructive beginning. They agreed to meet again next month in Baghdad. U.S. officials note there is still a long way to go before the world can be satisfied with Iran's claims that it's enriching uranium only for peaceful purposes. But both sides say they're willing to try a step-by-step approach to resolving the issue. NPR's Peter Kenyon has more.

It's the first in a series of conversations between host Rachel Martin and NPR sports correspondent Mike Pesca. Pesca digs deeper into big sports stories from the week, and brings one wildcard story that stayed under the radar.

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This is WEEKEND EDITION from NPR News. I'm Rachel Martin. North Korea's new young leader, Kim Jong Un, stood before cheering troops and citizens today to make his first public speech. The address rounded off two weeks of celebrations to mark 100 years since the birth of the nation's late founder and comes in the wake of Friday's failed missile launch. NPR's Louisa Lim reports on a new approach to leadership in the world's most isolated nation.

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Barely a day passes without a fresh example of abusive behavior in cyberspace. Cyber-bullying is an epidemic that's causing misery to a multitude of often vulnerable people. NPR's Philip Reeves says the problem is so bad in Britain that people there are fighting back.

Host Rachel Martin talks with Matthew Goodwin, an associate fellow with Chatham House, about anti-immigrant extremism in Europe. Goodwin explains why once-fringe political parties have gained widespread support.

Palo Alto, Calif., recently hosted a 12-hour bonanza for software developers, artists and families. The "Super Happy Block Party Hackathon" was a marathon for coders to make new software in a short amount of time. It also featured food trucks, music and homemade robots. Corey Takahashi reports.