This week, European leaders will huddle in intense meetings, trying to work out a comprehensive plan to solve crushing debt problems.

Higher stakes are hard to imagine.

If all goes well at a summit in Brussels, the political leaders will make an announcement Friday, spelling out their long-term commitment to a plan to loosen a choking tangle of debt troubles. If they can't agree on a plan, the EU debt crisis could lead to the kind of financial chaos that economists say surely would hurt the United States.

The U.S. relationship with Pakistan is in crisis, a week after an incident in which NATO troops killed 24 Pakistani soldiers along the Afghan border. The Pakistanis have cut off a key NATO supply line to Afghanistan, and they've refused to take part in the Bonn Conference on Afghanistan. NPR's Corey Flintoff reports from Lahore, Pakistan.

Herman Cain is a presidential candidate no more. Cain's campaign was always unconventional, and just as he made his unlikely rise to front-runner status, he was enveloped in controversy about alleged inappropriate behavior with women. His campaign never recovered. NPR's Tamara Keith looks back at his campaign.

Insurgent candidate Herman Cain suspended his campaign on Saturday. As Cain has fallen back, former House Speaker Newt Gingrich has emerged as the leading alternative to one-time presumptive front-runner Mitt Romney. NPR's Mara Liasson talks with host Audie Cornish about the changing political climate.

More than 32 tons of marijuana were found last week in an underground tunnel along the U.S.-Mexico border. It was one of the largest pot busts in U.S. history. Host Audie Cornish talks with Derek Benner, a U.S. Immigration and Customs Enforcement special agent, about the tunnel they found and the seasonal aspects of the drug trade.

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AUDIE CORNISH, HOST:

Now, to a tiny village here in the U.S. attempting to solve an environmental challenge. Nestled in the remote valley in Washington's Cascade Mountains, Holden Village is about to be flooded with hundreds of workers there to clean up the contaminated remains of an old copper mine.

Anna King, of the Northwest News Network, reports on what the cleanup will cost the town.

In Durban, South Africa, thousands of men and women poured into the streets in front of the International Conference Center, where United Nations talks about climate change are taking place. Host Audie Cornish speaks with NPR's Richard Harris, who is at the conference.

Mexican drug cartels have found a new source of labor to backpack marijuana into the United States: illegal immigrants.

Federal agents, prosecutors, defense attorneys and migrants themselves say that traffickers have begun recruiting undocumented immigrants at the border, both voluntarily and forcibly. Now, U.S. courts along the border have to decide what to do with terrified immigrants who come before them and say, "The cartel made me do it."