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From CNET News.com:
Ubiquitous, reliable, and free to the public, the Global Positioning System (GPS) is now taken for granted, but don't dump those maps from the glove box just yet, since it's uncertain for how long the U.S. government can continue to deliver.
The US plans to invest more than $5.8 billion through 2013 to modernize and replenish the existing GPS satellite constellation. But facing cost overruns of $870 million and "significant" technical problems, the US Air Force, which is in charge of GPS acquisition, has struggled to build and deploy the next generation satellites on schedule, according to a Government Accounting Office report.
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