As the Nasdaq closes above the record set 15 years ago, stock analysts are debating whether the market is approaching another bubble. Bryan Thomas/Getty Images hide caption

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McDonald's announced this week that it will pay workers in its company-owned stores $1 more per hour than the local minimum wage. Wal-Mart, Target and the parent company of Marshalls and TJ Maxx have also promised to boost wages for their lowest-paid workers this year. Lucy Nicholson/Reuters/Landov hide caption

itoggle caption Lucy Nicholson/Reuters/Landov

Cushing, Okla., is a major oil storage site. Amid record oil production, some analysts worry the U.S. will run out of places to put it all. Daniel Acker/Bloomberg via Getty Images hide caption

itoggle caption Daniel Acker/Bloomberg via Getty Images

President Obama remarks on his proposal to tighten consumer protections for people saving for retirement as Sen. Elizabeth Warren and Labor Secretary Tom Perez listen, at AARP on Monday. Getty Images hide caption

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A realty sign hangs in front of a home for sale in Orlando, Fla. Housing advocates say banks, stung by the housing crisis and its fallout, remain reluctant to lend. John Raoux/AP hide caption

itoggle caption John Raoux/AP

Jeffy Docteur is one of the students in the NStar electrician apprenticeship program outside Boston. He says he's interested in working on switching systems that keep power flowing through the electrical grid. Chris Arnold/NPR hide caption

itoggle caption Chris Arnold/NPR

Heartland Regional Medical Center in St. Joseph, Mo., is changing its name to Mosaic Life Care. It was the focus of an NPR and ProPublica investigation into its billing practices. Steve Hebert for ProPublica hide caption

itoggle caption Steve Hebert for ProPublica