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The number of men in the United States who are full-time, stay-at-home parents has risen steadily in recent decades, from maybe a million or so in 1984, according to a Pew Research Center estimate, to roughly double that in 2014.

That's still much smaller than the number of stay-at-home moms, of course, and many of the challenges these dads face are universal to parenting.

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Chicago is famous for its L, the transit system of mostly elevated trains. Soon it might have the X, a high-speed transit system some are calling Tesla in a tunnel. NPR's David Schaper has more.

With a litany of alleged ethics controversies swirling at home, embattled Environmental Protection Agency chief Scott Pruitt took the show on the road this week, meeting with farmers in a handful of Midwestern states to talk about his policy agenda.

While Thursday evening's meeting in Lincoln, Neb., was polite, the reception in other states has not been as welcoming, especially when it comes to conversations about his ethanol policies.

The Environmental Protection Agency intends to block an Obama-era proposal and effectively shield companies from scrutiny about how they prevent and respond to chemical disasters. At a hearing Thursday, agency officials got an earful from dozens of people who live and work near refineries and chemical facilities across the country.

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