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Alex Chadwick talks with Christopher Joyce, who just returned from a four-day meeting in Canada with biologists working on plan for an enormous eco-region stretching nearly 2,000 miles from Wyoming to the far north of Canada's Yukon Territory.

After leaving for better-paying jobs in the United States, migrants from the Mexican town of Malinalco find themselves missing their families and communities back home.

Filmmaker Liz Mermin talks about her documentary, The Beauty Academy of Kabul, which looks at the opening of a beauty academy by a group of Western women in Afghanistan.

President Bush names Air Force Gen. Michael Hayden to replace Porter Goss as director of the CIA, touching off what may be a tough confirmation battle. Several members of Congress have criticized a controversial eavesdropping program that Hayden ran as director of the National Security Agency.

The image of a potential moviegoer downloading full-length movies from the Internet and burning them to a DVD is one that gives many Hollywood studio chiefs fits. But for executives in the adult-movie industry, the process is the key to a new business model.

For years there has been controversy over how many Vietnam veterans suffer from post-traumatic stress disorder -- a psychiatric condition that can result from experiencing a terrifying danger. Using combat records for the first time, a landmark study in the journal Science comes up with a number lower than the onetime estimate of 30 percent but still significant: close to 20 percent.

Hot Cheetos are a big winner for the Frito-Lay company. The extremely spicy, crunchy and somewhat addictive snack is hugely popular with schoolkids. But school officials are threatening to ban the junk food because they worry that kids are gorging themselves.

A former contractor for the CIA is found guilty on four counts related to the beating death of a prisoner in Afghanistan. David Passaro is the first American civilian convicted of prisoner abuse in the Middle East. A onetime Green Beret medic, Passaro could face up to 11 1/2 years in prison when sentencing takes place later this year.

When five foreign students from Egypt didn't show up for a month-long course at a Montana university, a web-based tracking system went into action. The system had been created in 2001. A manhunt ensued and the missing students were located within a matter of days. It turns out they had come to find jobs, not to study.

Some railroad buffs looking for luxury travel are willing to spend big bucks to ride on a vintage train car. The restored private cars often feature formal dining rooms, plasma televisions and fine wood interiors. Fewer than 200 such cars exist in the United States.