National News from NPR

It's a politics-filled Saturday as Republicans hold a presidential candidate forum and the Democrats have their Jefferson-Jackson Dinner in Des Moines, Iowa. This year's dinner features Chicago Mayor Rahm Emanuel as the keynote speaker; four years ago the dinner launched then-Sen. Barack Obama's presidential candidacy into high gear. Guest host Linda Wertheimer talks with NPR's Don Gonyea about the events.

The bipartisan supercommittee enters the final weekend prior to its Nov. 23 deadline with little tangible progress to show for over two months of work. NPR's Andrea Seabrook tells guest host Linda Wertheimer that several of its members are huddling in Washington this weekend, trying to come up with a way to reduce the government's budget deficit.

When President Obama came into office, he promised to close the prison at Guantanamo Bay, Cuba, for good. In the years since, lawmakers on both sides of the aisle have made that difficult. Congress has barred the transfer of Guantanamo detainees to the continental U.S. and has made it difficult to send the suspected terrorists to third countries. That may be why the prison is beginning to feel permanent.

In the crowded race for the 2012 Republican presidential nomination, Mitt Romney may be the tortoise, but Newt Gingrich is the newt. And newts are highly adaptive salamanders that regenerate limbs when wounded and emit poison when challenged.

Conventional — and up-to-the-minute contemporary — wisdom pegs Gingrich as the ascendant favorite, knocking other candidates off their posts and platforms like an Angry Bird.

The congressional supercommittee has only a few days left to come up with a plan to cut $1.2 trillion from the federal deficit. One of the areas on the chopping block is the nation's defense budget, and Pentagon officials are pushing back against any cuts beyond the $450 billion they've already been asked to make.

The defense budget is an easy target when it comes to cutting the deficit, because it makes up half of the federal government's entire discretionary budget, says Todd Harrison, a senior fellow at the Center for Strategic and Budgetary Assessments.

Should the United States give aid to China? Given America's trade imbalance with China, few politicians think it's a good idea.

That's why a hearing over $4 million that the U.S. Agency for International Development intends to spend on environmental programs in China drew such heat on Capitol Hill this week.

A bipartisan group of lawmakers lined up at a House hearing on Tuesday to denounce the program as "an insult to the American taxpayer" that would pour "U.S. taxpayer dollars down the toilet."

We were stunned when we saw this image:

According to HRL Laboratories that is an "ultralight metallic microlattice" sitting atop a dandelion. The material was developed by scientists at HRL, The California Institute of Technology and the University of California, Irvine.

The material is 99.99 percent air and 100 times lighter than styrofoam.

There's no Peggy Sue — or even a Margaret or a Susan, for that matter — in the British folk-rock band Peggy Sue. There is, however, a hard-driving group that has just released its second album, Acrobats. Peggy Sue is the trio of singers and guitarists Rosa Slade and Katy Young, and drummer Olly Joyce.