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_ Large quantities of meth are turning up in American cities, where it was seldom seen in the past.

_ On “Breaking Bad,” the Heisenberg brand of designer meth is being seen in Walter’s hometown of Albuquerque and throughout the Southwest, as tracked by his brother-in-law, who, inconveniently, happens to be a local DEA agent.

The future:

_ The real-life prospects for drug trafficking in the U.S. typically seem to lie somewhere between unknowable and bleak.

_ What happens next on “Breaking Bad” (whose final eight episodes air next summer) is as closely guarded by the show’s producers as any undercover drug ring’s trade secrets. But maybe one way to crack how the series might conclude is to follow news about the all-too-real drug wars.