A U.S. F-16 jet fighter took off from a NATO airbase in Aviano, Italy, last month. The Pentagon has estimated that U.S. involvement has cost taxpayers more than $600 million at last count. Luca Bruno/AP hide caption

itoggle caption Luca Bruno/AP

Egyptian anti-goverment demonstrators flood Cairo's landmark Tahrir Square early Friday. Pedro Ugarte/AFP/Getty Images hide caption

itoggle caption Pedro Ugarte/AFP/Getty Images

President Obama spoke about the economy Wednesday after touring Orion Energy Systems, a technology and clean energy company in Manitowoc, Wisc. Jewel Samad/AFP/Getty Images hide caption

itoggle caption Jewel Samad/AFP/Getty Images

Dr. Peter Rhee (right) discusses Rep. Gabrielle Giffords' condition. The three-term Arizona Democrat was shot in the head Saturday. Chris Carlson/AP hide caption

itoggle caption Chris Carlson/AP

Construction workers lug building materials at a job site in New York's midtown Manhattan. While a number of industries added jobs in December, the construction sector lost 16,000. Swoan Parker/AP hide caption

itoggle caption Swoan Parker/AP