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STEVE INSKEEP, HOST:

London Bridge isn't falling down, but Britain's Parliament building — which sits along the River Thames and includes Big Ben — needs a ton of work. U.K. lawmakers are now analyzing a massive rehab plan that will cost billions of dollars and could force legislators to work somewhere else for years.

Readers asked: "When a humanitarian group has helped a community become self-sustaining, how can the group create a good 'exit strategy.'"

Our sources answered: Create the exit strategy from the get-go.

In the Wilmington neighborhood of Los Angeles, residential streets dead end at oil refineries. Diesel trucks crawl through, carrying containers from nearby ports. Longtime resident Magali Sanchez Hall says the pollution from all that has taken a toll, right on the street where she lives.

"The people that live here, the mother died of cancer," she says, pointing to a modest one-story home. "The people that live here, three people died of cancer."

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