Nina TotenbergNina Totenberg is NPR's award-winning legal affairs correspondent.
A woman checks her cellphone as she waits in line to enter the Supreme Court on Wednesday to hear arguments in Carpenter v. United States about the government's access to cellphone data.
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The U.S. Supreme Court confronts the digital age again on Wednesday. At issue is whether police have to get a search warrant in order to obtain cellphone location information that is routinely collected and stored by wireless providers.
The Supreme Court, pictured in June, opened its new term on Monday. The justices heard arguments in a case about nonunion employees' right to take action against alleged illegality by their employer.
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