NPR News

(Revised at 2:03 pm ET with new Ron Paul-Pennsylvania material.)

The contest for the Republican presidential nomination may be over for all practical purposes, with Mitt Romney the all-but-certain GOP nominee. But that doesn't mean there's nothing of interest in Tuesday's primaries.

Voters are going to polls in Pennsylvania, Rhode Island, Connecticut, Delaware and New York, though turnout is expected to be low. Still, here are four things to watch for.

I have to admit I was a bit reluctant when I first saw this series of "Bicycle Portraits" because biking has, in some cases, become something of a cliche steeped in hipdom sprinkled with granola. Or mainly: For NPR to present a series of bicycle portraits just seemed too cute, too predictable.

"The first criminal charges in connection with the BP oil spill have been filed against a former BP engineer named Kurt Mix," NPR's Carrie Johnson reports exclusively.

Carrie just told our Newscast unit that Mix has been charged with obstruction of justice for allegedly deleting text messages after the spill. The texts were related to the amount of oil gushing into the Gulf. Mix will make his first appearence in court today.

More adults are helping pay for aging parents, at an average of $3,500 a month, according to MetLife. That's why experts say it's vital to plan for a future that includes parents. For NPR's series, "Family Matters: The Money Squeeze," host Michel Martin speaks with NPR's Marilyn Geewax, journalist Joan Lunden, and Houston Mayor Annise Parker.

As part of Tell Me More's series for National Poetry Month, host Michel Martin shares a poetic tweet from poet and poker player Joel Dias-Porter. Listeners are invited to tweet original poems of 140 characters or less to #TMMPoetry.

As a little girl, Anna Quindlen wasn't afraid of a whole lot. She frequently got into trouble and occasionally shot off her mouth. But as she grew older, the Pulitzer Prize-winning writer became what she calls a "girl imitation."