Rick Santorum and his campaign will likely look back on Michigan's 2012 primary not only as a heartbreaking loss in the battle against Mitt Romney but also as a historic lost opportunity.

The upstart former senator from Pennsylvania was within a few percentage points of toppling the wobbly frontrunner in a state that really mattered.

Unlike his earlier wins in caucus states (Iowa, Colorado, Minnesota) and a nonbinding "beauty contest" (Missouri), a win in Michigan meant a real cache of committed delegates.

New research indicates that five days after major NASCAR races, there is a measurable increase in traffic accidents caused by aggressive driving.

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And while Mitt Romney was eking out that win in Michigan, he pretty much walked away with yesterday's Arizona primary. Romney was expected to win in Arizona, but he walloped his closest challenger - that would be Rick Santorum - by 20 percentage points. Helped, in part, by the support of the last Republican presidential nominee, Arizona Senator John McCain.

And while all the attention was on Michigan throughout the night, NPR's Ted Robbins reports that in the all-important delegate count, the Arizona win counts for nearly as much.

GOP presidential hopeful Mitt Romney turned back challenges from former Pennsylvania Senator Rick Santorum in Arizona., where Romney won easily, and in Michigan, where he eeked out a close win in the state where he was born. Before Tuesday night, Romney's last primary win was in Florida a month ago.

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And that brings us to our last word in business on this Leap Day: a rare proposal. Traditionally in many European countries Leap Day was considered the only day when a woman could propose to a man. And one restaurant in Swindon, England seems to be capitalizing on that.

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NPR's business news starts with an invitation from Apple.

Journalists were invited yesterday by Apple for a product event next month. And that was enough to send the company shares to another all-time high. There's wide speculation the event will introduce the next generation of its iPad tablet. The iPad 3 is expected to have a faster processor and a high definition display. Transcript provided by NPR, Copyright National Public Radio.

Pakistani journalist Pir Zubair Shah has been following drone strikes in the border region between Pakistan and Afghanistan for more than half a decade. He talks to Morning Edition's Steve Inskeep about his recent article in Foreign Policy magazine titled "My Drone War."

The deadly violence in Afghanistan over the burning of Qurans by the U.S. military has brought the American-led NATO mission to a crossroads. Among the dead have been four Americans — two of them by an Afghan policeman inside a supposedly highly secure government ministry building. The U.S. pulled all its advisers from those ministries.

You've heard of identity theft — someone using a person's credit information or a Social Security number for ill-gotten gains. Well, experts say similar crimes are also affecting businesses.

Business identity theft involves posing as a legitimate business in order to get access to credit lines or steal customers. Experts believe that the practice has become more prevalent in the past two years.

The year the Quidi Vidi Brewing Co. started brewing beer with iceberg water, a giant iceberg floated up against the cliffs around St. John's, Newfoundland.

"It was a big berg and it jammed right across the harbor here," says Charlie Rees, the brewery's tour guide.

Rees says Newfoundlanders have a curious relationship with icebergs. On the one hand, they're a fact of life. On the other, when that iceberg was in the harbor's mouth, hundreds of people came down to gawk. He took pictures.