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Another Tuesday, another critical day for the 2012 Republican presidential contenders.

This time the locations are Michigan, where most polls close at 8 p.m. ET, and Arizona, where voting ends at 9 p.m. ET. The story political junkies are watching closest: Will former Massachusetts Gov. Mitt Romney, a Michigan native, hold off a strong challenge there from former Pennsylvania Sen. Rick Santorum?

Also on the ballots, of course: former House Speaker Newt Gingrich and Rep. Ron Paul, R-Texas.

When he returned from Afghanistan and saw his partner waiting to welcome him home, "four years of pent-up emotion and secret love" just seemed to naturally lead to "what felt like an eternity kiss," Marine Sgt. Brandon Morgan told NPR this afternoon.

If you take a cholesterol-lowering drug called a statin, there's some new safety information you should know about.

A statin might be why you're having trouble remembering things or have been feeling confused, or at least that's what quite a few people taking the drugs have been saying.

For airlines, it ain't easy making a buck. In fact, even a penny is out of reach.

Airlines for America, a trade association for major U.S. carriers, says the industry earned less than half a penny in profits for every $1 of revenue generated during 2011.

The poor financial performance wasn't a fluke. Over the past decade, airlines have lost a collective $50 billion.

On Tuesday, the trade group said something has got to change. Association CEO Nicholas Calio sat down with journalists to explain a new industry push for a "National Airline Policy."

Mandatory DNA collection is fast becoming routine in the American criminal justice system. In many jurisdictions, just being arrested can mean having to submit a genetic sample to the national database. Federal law enforcement and 26 states now permit various forms of pre-conviction DNA sampling and more states are poised to follow suit.

For the first time since the 2008 financial crisis, the Dow Jones Industrial average has closed above the 13,000 mark.

It didn't do it by much — about 5 points.

We'll have more in a moment.

Update at 4:15 p.m. ET:

It's true that you can still get by in rock 'n' roll on the strength of a unique voice. But it helps if said voice has something interesting to work with.

On the first three records by Heartless Bastards, that wasn't always the case. The Mountain, from 2008, had some terrific songs about a breakup, and a few that got bogged down in a rut. But on the band's latest release, Arrow, every song has a powerful, almost magnetic melody.

On tonight's All Things Considered, NPR's Robert Siegel talks to the chief of the International Monetary Fund Christine Lagarde.

Naturally, Robert focused his interview on Greece, which has been engulfed in a debt crisis that has threatened its membership in the European monetary union. Robert asked Lagarde about the tough austerity measures Greece has agreed to and whether those measures could promote a shrinking economy as opposed to getting Greece back to prosperity.