Look for sunglasses with an eye-sun protection factor (E-SPF) between 25 and 50, he said.

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Other e-mails indicate the media's presence was a factor in agency decision-making.

CNN: E-mails show FEMA infighting, frustration

"Thus, E-4 appears as a risk factor for both heart disease and Alzheimer's disease, two major causes of mortality and morbidity at advanced ages, " Francois Schachter and his colleagues at the Center for the Study of Human Polymorphisms, a genetic-research center in Paris, conclude in a report.

WSJ: A Gene Gives a Hint Of How Long a Person Might Hope to Live

Another factor working against mandatory E-Verify legislation is vocal opposition to the bill from the agriculture industry.

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In the US, traditional incumbents are beginning to move from physical retailing to e-commerce, but most retain a heavy cost footprint in brick-and-mortar form factor.

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On the teensy end, the E 4200 offers a 12.1-inch WXGA screen in a 2.2 pound form factor, with 32GB and 64GB SSD options.

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The "two-factor" verification system, which will be optional, asks users to register a phone number, e-mail account and six-digit code that would have to be entered, via text message, each time they log in to the site.

CNN: Twitter bumps up log-in security after hacks