Nearly 4 million people are members of CouchSurfing.org and can find a host in every country — including North Korea — free of charge.

New Yorker staff writer Patricia Marx became a member recently and stayed with seven friendly strangers, from a graduate student in Iowa City to a couple in Bermuda in their 60s. She wrote about her experience for the magazine.

It's safe to say that when it comes to recent presidents, Ronald Reagan is the most venerated, especially among Republicans but not exclusively so. Some even accuse conservatives of beatifying the 40th president as though he were on the road to sainthood.

So it's not surprising there would be a Reagan relic out there, specifically a medical-lab vial purportedly containing the dried remains of a blood sample taken from the president on the day he was nearly assassinated in March 1981.

When we first kicked around the idea of asking people to share their opinions about compensating organ donors, it was pretty clear that we were on to something. Everybody in the newsroom seemed to have a strong feeling about it.

For the most part, we don't hear novel arguments in favor or against the controversial issue of immigration. Mayor Michael Bloomberg has been one of the few to take a different view. Last year, he advocated opening the door to new immigrants if they all moved to Detroit.

At the time, it was derided as weird.

Patrick Fitzgerald, the federal prosecutor who obtained the conviction of Vice President Cheney's chief of staff for lying to authorities about the leaking of a CIA officer's name and who sent former Illinois Gov. Rod Blagojevich (D) to jail on corruption charges, is stepping down from his post.

Surely you've noticed the proliferation of certifications advertising farmers' and food companies' virtuous commitments to fix the environment or promote health. These seals can reassure, but the sheer volume of them can also confound. How to choose between grass-fed, organic, hormone-free or free range?

Now imagine that you have to feed 50 million people a day in 80 countries around the world. And every day more of those people are demanding that the food you serve them be organic, gluten-free, or fair trade.

Campaign fever is in the air in Cairo and around Egypt. Millions of voters go to the polls, Tuesday and Wednesday, for what many believe to be the country's first free election in its long history. Host Michel Martin discusses what's at stake in this election with Sherine Tadros, the Egypt correspondent for Al Jazeera English.

The NAACP is officially supporting same-sex marriage. The group says marriage equality is a civil right and is encouraging black voters to support the issue if it shows up on state ballots. Host Michel Martin talks with Julian Bond, chairman emeritus of the group.