NPR News

The battle between the Obama administration and the House Oversight and Government over the Fast and Furious operation just ratcheted up another notch. There's word that the White House is exerting executive privilege over documents that the committee's Republican majority has subpoenaed.

New Democracy party leader Antonis Samaras has been sworn in as Greek prime minister, correspondent Joanna Kakissis and Sky News report.

As Joanna reported earlier for our Newscast Desk, Samaras' conservative New Democracy party came in first during Sunday national elections, but didn't get enough support to govern on its own. So it will share power with the Socialist PASOK and a small pro-European party — The Democratic Left.

We don't do too many traffic reports, but this news has the potential to be both fascinating and frustrating — depending on whether you're watching from afar or stuck inside a gridlocked car:

The Chesapeake Bay Bridge that carries U.S. Route 50 traffic back-and-forth between Washington, D.C., and mid-Atlantic beaches will be closed for about 40 minutes today, starting around 1:15 p.m. ET, so that a cargo ship carrying four huge cranes can pass (safely, we hope) beneath the span.

The four-man vocal ensemble New York Polyphony sings ancient music built for big resonant spaces. Since they can't just pop into St. Patrick's Cathedral any time they need to practice a renaissance mass, the group rehearses sometimes in the Jackson Heights home of bass singer Craig Phillips. There, in a modest-sized living room, they can hear every detail. "It's a very different experience rehearsing in a dry room and a small room," says tenor Geoffrey Silver. "You actually hear what you and your colleagues are singing, there's no watercolor wash over what you are doing."