Buck began using Twitter as a way to keep up in touch with the bloggers at the heart of his project and the events going on in Egypt that he intended to cover.

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Some Mexican firms are hoping to join the booming life-sciences industry in the U.S. Medical device maker Innovamedica has a product in development called a ventricular assistive device--used to keep patients alive during heart surgery--that is undergoing animal trials at the Texas Heart Institute.

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The 24-year-old's heart stopped for 78 minutes as doctors struggled to keep him alive at the stadium and then later at the London Chest Hospital on March 17.

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In her final state of the city address as speaker, Ms. Quinn on Monday said the city's top priority must be to "keep our middle class here, " and she described affordable housing as being at the heart of a "crisis" afflicting this shrinking segment of the city.

WSJ: Quinn Address Aims at Middle Class

And so when I see all the young people who are here today -- or the young at heart -- (laughter) -- we need you guys to keep at it.

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Acomplia also helped patients keep the weight off, according to two-year data presented here at the annual meeting of the American Heart Association.

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On Wednesday, the same FDA panel will discuss whether to keep Meridia, an Abbott weight loss drug, on the market at all after data show it may cause heart attacks.

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