The Blue Button challenge has empowered tens of thousands of Americans and seeded a growth industry that should help lower healthcare costs and improve quality.

WHITEHOUSE: Health Care Blog | The White House

More advanced divers will be lured to the challenge of the Blue Hole dive site just north of town.

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Mercer expressed the wish after the Blue Sox's narrow Challenge Cup defeat in March that his side could play Bradford every week, so confident was he of ending their unbeaten record.

BBC: Bulls mock Blue Sox

As the investments in both Blue Origin and the 10, 000-year clock show, it is the challenge of reaching for distant horizons that really makes Amazon's boss tick.

ECONOMIST: Brain scan

You'd think that, by now, some form of artificial intelligence -- the iPhone's Siri or "Jeopardy's" Watson or perhaps some combination of IBM's Deep Blue and MIT's Kismet -- would have been able to meet the challenge.

CNN: Roboticist sees improvisation through machine's eyes

The need to train skilled blue-collar workers something the country has neglected for generations presents a major challenge in places like Louisiana and Texas, where education levels remain below the national average, as well as the more literate but less populous Dakotas.

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