Rebel fighters drive through western Tripoli, Libya, on Monday. Large numbers of rebels have entered the capital, but Moammar Gadhafi's loyalists are putting up stiff resistance. Sean Carberry/NPR hide caption

Drug firms fear that being "liked" on Facebook could get them in trouble with the FDA. iStockphoto.com hide caption

Montana Sen. Max Baucus, chairman of the Senate Finance Committee, walks to a bipartisan meeting on the deficit hosted by Vice President Biden in May. Baucus is one of 12 lawmakers who've been named to the new Joint Select Committee on Deficit Reduction, dubbed the "supercommittee." Saul Loeb/AFP/Getty Images hide caption

Syrian soldiers shout slogans in support of President Bashar Assad Aug. 10 as they withdraw from the city of Hama after a 10-day military operation to quell pro-democracy protests. This photo was taken during a government-guided tour. AFP/Getty Images hide caption

In Jackson, Miss., in 1963, three very different women — from left, Skeeter Phelan (Emma Stone), Minny Jackson (Octavia Spencer) and Aibileen Clark (Viola Davis) — build an unlikely friendship around a secret writing project in The Help, based on the novel by Kathryn Stockett. Dale Robinette/Dreamworks Pictures hide caption

A look inside the Dark Energy Camera shows the 74 blue-tinged sensors that detect light. The camera will survey distant, faint galaxies to learn more about dark energy. Reidar Hahn/Fermilab hide caption

A worker monitors the production line as cases of Fage yogurt are produced in Johnstown, N.Y., in 2008. Fage and Chobani lead the pack of best-selling Greek-style yogurt brands. Mike Groll/AP hide caption