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"Top Of Your Head" - Kamikaze Hearts

China's "Tianhe-2" (Milky Way 2) supercomputer took first place in one recent speed test, clocking in at 30 quadrillion calculations per second--about twice as fast as the best American machines. The U.S. still has more supercomputers than any other nation, but some experts say computer speed is a measure of a country's scientific innovation, and worry the U.S. is lagging behind.

When Stanford professor Andrew Ng put one of his classes online, more than 100,000 students signed up. Now he's co-founded a company, Coursera, with the potential to give millions of students free access to classes from Stanford, Princeton, the University of Pennsylvania and other schools.

Here's your recap of what happened in the leadership shakeup at the Centers for Disease Control and Prevention this week.

At issue is whether the University of Texas, Austin discriminated against a white applicant when it did not offer her a spot. At Wednesday's argument, a court majority seemed poised to reverse or severely cut back previous decisions related to affirmative action programs in college admissions.

In new ads, President Obama and Mitt Romney seek to raise doubts about each other's character. Romney accuses the president of being willing to do anything to stay president. Obama's ad accuses Romney of making a "blatantly false" claim.

The lessons of the final deal come down to this: Washington is very nearly broken. Next up? Finishing the work this agreement postponed.

Federal spending cuts may have hurt the U.S. economy's fourth-quarter growth. But don't count on that changing the dynamics of the current debate over the sequester, the ax poised to start hacking $1.2 trillion from federal spending if Congress fails to stop it by the March 1 deadline.

The CW took a big risk when it adapted a Venezuelan telenovela for American prime time. Now, Jane The Virgin is being renewed for a second season.

The bidding period has closed for the companies hoping to design and deliver the president's signature campaign promise. Here's a glimpse of some proposals — from wire mesh to 30-foot pipe organs.