
From left, Spanish Prime Minister Jose Luis Rodriquez Zapatero, NATO Secretary-General Anders Fogh Rasmussen and U.S. Defense Secretary Leon E. Panetta discuss defense after a meeting of NATO ministers in Brussels on Wednesday. (Associated Press)

NATO Secretary-General Anders Fogh Rasmussen listens to questions during a media conference at NATO headquarters in Brussels on Monday, Oct. 3, 2011. (AP Photo/Virginia Mayo)

NATO Secretary-General Anders Fogh Rasmussen listens to a question during a media conference at the Residence Palace in Brussels on Wednesday, July 6, 2011. (AP Photo/Virginia Mayo)

U.S. Defense Secretary Robert M. Gates (right) and NATO Secretary-General Anders Fogh Rasmussen attend a round-table meeting of NATO defense ministers in Brussels on Thursday, June 9, 2011. (AP Photo/Virginia Mayo)

U.S. Secretary of Defense Robert M. Gates (right) shakes hands with NATO Secretary-General Anders Fogh Rasmussen at a meeting of NATO defense ministers in Brussels on Wednesday, June 8, 2011. (AP Photo/Jason Reed, Pool)

NATO Secretary-General Anders Fogh Rasmussen said Tuesday that Russia cannot be a direct participant in a planned missile-defense system. "NATO cannot outsource to nonmembers collective defense obligations which bind its members," he said. (Associated Press)

** FILE ** NATO Secretary-General Anders Fogh Rasmussen speaks during a media conference at NATO headquarters in Brussels on Wednesday, May 4, 2011. (AP Photo/Yves Logghe, File)

NATO Secretary-General Anders Fogh Rasmussen (left) and Afghan President Hamid Karzai have a joint press conference at the Presidential Palace in Kabul, Afghanistan, on Tuesday, May 24, 2011. (AP Photo/Mustafa Quraishi)

British Prime Minister David Cameron (left) listens as U.S. Secretary of State Hillary Rodham Clinton speaks at the London Conference on Libya on Tuesday, March 29, 2011. U.N. Secretary-General Ban Ki-moon, the Arab League, NATO chief Anders Fogh Rasmussen and up to 40 foreign ministers were attending the talks, seeking to ratchet up the pressure on Col. Moammar Gadhafi to quit. (AP Photo/Stefan Rousseau, pool)