Three layers of checks must be passed before an aglet is allowed access to a computer, and one of these layers can be customised for example to reject aglets whose owners do not have subscriptions to a commercial database.

ECONOMIST: Computer viruses need not be all bad

Worldwide, there were only 373 fatalities on scheduled commercial passenger flights in 2011, according to the non-profit Aviation Safety Network Database.

BBC: What is the safest mode of travel?

Avidsen, a provider of market information to the global commercial insurance industry, reported Monday that securities litigation tracked 169 securities cases in its Master Significant Case and Action Database, 35.2% ahead of the 125 cases in the fourth-quarter of 2008, and 26.1% ahead of the previous year's corresponding period.

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