Mateo Solares came to Argentina from Bolivia a few years ago. The 25-year-old was born, and grew up as, Moyra Veronica. Biologically female, Solares says he always felt like a guy.

The main reason Solares moved to Argentina is because it seemed like an easier place to transition into a life as a young man. He says having an ID card that reflects how he sees himself is huge.

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MELISSA BLOCK, HOST:

This is ALL THINGS CONSIDERED from NPR News. I'm Melissa Block.

AUDIE CORNISH, HOST:

Here's something President Obama and Mitt Romney agree on: America's tax system is too complicated. Both men have outlined changes that are broadly similar, but with some important differences.

The Problem:

Today's tax code is like a department store, where the price tags are high, but there are lots of coupons, sales and weekend specials. That creates some inequities. Just as shoppers can pay different prices depending on which day they buy, taxpayers with the same income can pay very different rates depending on which deductions they qualify for.

Let's say you're pushing 115 mph on the highway, racing neck and neck with a Chevy Camaro — in an online video game, of course.

Right as you're pulling into the lead, you notice a billboard pop up on your TV screen. Early voting has begun? Voteforchange.com? Whoa, keep your eyes on the road!

This is Need for Speed: Carbon, one of 18 games that the Obama campaign advertised in during the 2008 campaign. This year, President Obama is back at it, running ads in Madden NFL 13, on the free online game site Pogo.com, and in mobile games like Tetris.

When there's something really wrong with a published study, the journal can retract it, much like a carmaker recalling a flawed automobile.

But are the errors that lead to retractions honest mistakes or something more problematic?

A newly published analysis finds that more than two-thirds of biomedical papers retracted over the past four decades were the result of misconduct, not error. That's much higher than previous studies of retractions had found.