Grover Norquist (left), of the anti-tax lobbying group Americans for Tax Reform, and Sen. Tom Coburn (R-OK, right) have been in an unusually public spat. Coburn, who seven years ago signed Norquist's so-called Taxpayer Protection Pledge, now says a solution to the deficit could involve an increase in tax revenues. Tim Sloan/AFP/Getty Images (Norquist photo); Chip Somodevilla/Getty Images (Coburn photo) hide caption

itoggle caption Tim Sloan/AFP/Getty Images (Norquist photo); Chip Somodevilla/Getty Images (Coburn photo)

House Budget Committee Chairman Paul Ryan says the 2012 plan is about protecting Medicare. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

The proposed budget would take gray wolves in the northwest off the list of endangered species. AP hide caption

itoggle caption AP

A US Navy F-16 fighter jet based at Sigonella airbase on the Italian island of Sicily takes off for operations in Libya. Mario Laporta/AFP/Getty Images hide caption

itoggle caption Mario Laporta/AFP/Getty Images