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If you pay any attention at all to ads for vitamins, you'd be forgiven for thinking they're good for just about anything that could ever ail you.

The biggest scandal in the world right now has nothing to do with sex or celebrities. It's about an interest rate called LIBOR, or the London Interbank Offered Rate.

Most Americans probably never heard of LIBOR. When I first moved to New York, I hadn't. Back then, I could barely afford my apartment and got an adjustable rate mortgage. And so I wondered: When my rate adjusts, how will I know how much I'll be paying?

I searched through all the documents and it was right there — LIBOR. I would be paying a few percentage points above whatever LIBOR was.

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Pablo Helguera is a New York-based artist working with sculpture, drawing, photography and performance. You can see more of his work at Artworld Salon and on his own site.

If the Supreme Court says President Obama's Affordable Care Act includes a tax, then why is his rival Mitt Romney paying a political price? And who would have guessed in the aftermath of the ruling the right would attack Chief Justice John Roberts. Plus: It's getting nerve-wracking for Charlie Rangel.

NPR's Ron Elving and Ken Rudin have the latest political news in this week's roundup.