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State and city officials knew about problems with Flint's water even as they encouraged people to keep using it. Locals are disillusioned, and angry, and rebuilding that trust will be challenging.
A few years ago, glass bottles with handwritten messages inside started washing up along the New England coast. They're the work of Ken Baker. One recently found its way to Ireland.
A massive methane leak may soon end, but its environmental impact is still being weighed. A scientist says it won't have a big effect globally, but it's a setback in efforts to curb greenhouse gases.
Humans rely on dogs to search for bombs. But the increasingly common Improvised Explosive Devices can be made with ordinary ingredients — and it is posing a new challenge for bomb-sniffing dogs.