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NPR's Neal Conan reads from listener comments on previous show topics including extreme rivalries in sports, those living with obsessive-compulsive disorder and the legacy of legendary women's basketball coach Pat Summit.

A home run by Washington Nationals outfielder Jayson Werth during spring training had baseball lovers breaking out the tape measure to figure out how far the ball had gone. Sports writer Jane Leavy explains the practice that dates back to Mickey Mantle's historic 565 foot hit in 1953.

After 911 tapes were released, the story of Trayvon Martin, an unarmed teen who was killed by neighborhood watch volunteer George Zimmerman, received a flurry of national attention. Much of the subsequent news coverage is focused not on the case itself, but the narrative constructed by the media.

Norwegian scientists say as many as 1 in every 4 cases of breast cancer doesn't need to be found because it would never have caused the woman any problem.

It's a startling idea for laypeople (and many doctors) thoroughly indoctrinated with the notion that any breast cancer is medically urgent — and should be found at the earliest possible moment.

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MICHEL MARTIN, HOST:

I'm Michel Martin and this is TELL ME MORE from NPR News. Coming up, it's National Poetry Month, and just as we did last year, we want the celebration to include you, so once again we're inviting you to send us your poems via Twitter. Poet Holly Bass kicks off our month-long tweet poetry series. We call it Muses and Metaphor. That's in just a few minutes.

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MICHEL MARTIN, HOST:

Former Vice President Dick Cheney was released this morning from the Fairfax, Va., hospital where he received a heart transplant on March 24.

NPR's Don Gonyea forwards us this statement from Cheney's office:

As the Census Bureau was reporting earlier this morning about a 1.3 percent gain in orders for manufactured goods in February from the month before, automakers were saying that March was perhaps their best month in almost four years, The Associated Press says:

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DAVID GREENE, HOST:

In Britain, scandal has plagued the Murdoch family and its News Corp. media conglomerate. And today, another blow. Under pressure, Rupert Murdoch's son, James Murdoch, is stepping down as chairman of British Sky Broadcasting, also known as BSkyB. This occurs against the backdrop, of course, of the phone hacking and police bribery scandal that has focused heavily on two Murdoch tabloid newspapers. NPR's media correspondent David Folkenflik has been covering all of this and he joins us now to sort this out. Good morning, David.

The hacking scandal that has ripped through Rupert Murdoch's newspapers in the U.K. has now led to son James Murdoch's decision to step down as chairman of the satellite broadcast giant BSkyB.

NPR's David Folkenflik tells our Newscast Desk that:

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DAVID GREENE, HOST:

And that brings us to our last word in business, flying cars. Finally, they're here. Well, almost here. We're not exactly in Jetsons' territory quite yet. But a company in Massachusetts says its prototype flying car, called the Transition, completed its first flight and will be ready for sale within the next year.

The two-seat vehicle soared to 1,400 feet in its maiden voyage. The car - can we call it that - is expected to cost $279,000, and 100 buyers have already plunked down their deposits.

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An inspector general's report about "excessive and wasteful" spending on a 2010 conference in Las Vegas hosted by the federal government's General Services Administration has cost GSA administrator Martha Johnson her job.

Mitt Romney and Rick Santorum have been fighting it out in Wisconsin for the past week. And Tuesday night they'll see the results of their labors. Republicans will also cast votes Tuesday in Maryland and Washington, D.C., primaries, though the candidates have not spent much time there.

In all three contests, polls show Romney with a wide lead. Yet Santorum continues to campaign as relentlessly as ever. On Tuesday's Morning Edition, NPR's Ari Shapiro and David Welna filed reports from the trail.

Once the Republican presidential primaries entered April, leaving behind March with its run of several Southern contests, the electoral terrain was expected to start looking much better for Mitt Romney.

That seems the case Tuesday, as Wisconsin, Maryland and the District of Columbia hold the first primaries in April, with a total of 98 delegates at stake. The front-runner for the GOP presidential nomination is expected to have a very good day. Just how good remains to be seen.

Medicare coverage for people with depression used to be, well, depressing. But that's starting to change.

In October, the Centers for Medicare and Medicaid Services began covering screening for depression without any cost-sharing when Medicare beneficiaries visit their primary care doctor.

Hafiz Mohammad Saeed, the suspected mastermind behind the 2008 attacks in Mumbai, India, that left 166 people dead, now has a $10 million bounty on his head from the U.S. State Department's "Rewards for Justice" program.

Six American citizens died in the Mumbai massacre.