Syrian has come under increasing international pressure in recent days. On Monday, Syrians protested in the capital Damascus against the Arab League's decision to impose sanctions. Syria has also come under sharp criticism from an independent commission that accused the security forces of systematically carrying out abuses against anti-government demonstrators. Yin Bogu/Xinhua /Landov hide caption

itoggle caption Yin Bogu/Xinhua /Landov

Hussain Haqqani, Pakistan's ambassador in Washington (right), talks to President Asif Ali Zardari in Multan, Pakistan, in August. Haqqani resigned over claims he wrote a memo to Washington asking for its help in reining in Pakistan's powerful military. B.K. Bangash/AP hide caption

itoggle caption B.K. Bangash/AP

Pakistani protesters shout slogans during a protest in Multan on Oct. 14 against U.S. drone attacks in Pakistani tribal areas. Officials said U.S. drone strikes on Oct. 13 killed 10 militants, including a senior commander in the Haqqani network. Drone attacks are one way the U.S. hopes to squeeze the Haqqani militants. AFP/Getty Images hide caption

itoggle caption AFP/Getty Images

Australian Prime Minister Julia Gillard and President Obama hold a joint news conference in Australia on Wednesday. The U.S. is sending some 250 U.S. Marines to the country next year, a number that will later grow to 2,500. Saul Loeb/AFP/Getty Images hide caption

itoggle caption Saul Loeb/AFP/Getty Images

U.S. Secretary of State Hillary Clinton looks on as Pakistani Foreign Minister Hina Rabbani Khar speaks at a joint news conference in Islamabad on Friday.

Anjum Naveed/AP hide caption

itoggle caption Anjum Naveed/AP

Libyan leader Moammar Gadhafi, shown in a 2008 file photo, ruled Libya for 42 years. Libya's new leaders say he was killed Thursday in his hometown of Sirte.

Sergei Grits/AP hide caption

itoggle caption Sergei Grits/AP

Pakistani security personnel stand alert on a street in Quetta in September. Proposed appropriations bills in both the U.S. House and Senate make economic and military assistance to Pakistan conditional. Banaras Khan/AFP/Getty Images hide caption

itoggle caption Banaras Khan/AFP/Getty Images

Defense Secretary Leon Panetta looks on at left as Joint Chiefs Chairman Adm. Michael Mullen testifies Thursday in Washington. Harry Hamburg/AP hide caption

itoggle caption Harry Hamburg/AP

U.S Treasury Secretary Timothy Geithner (left) speaks to French Finance Minister Francois Baroin (right) during talks in Marseille earlier this month. The U.S. is increasingly concerned that the European debt crisis will have an impact on the U.S. economy. Lionel Cironneau/AP hide caption

itoggle caption Lionel Cironneau/AP

The Louis S. St Laurent icebreaker slices its way through the ice of the Northwest Passage. Jackie Northam/NPR hide caption

itoggle caption Jackie Northam/NPR

A model of a surveillance drone by the French Dassault Aviation and the British BAE Systems is on display at the International Paris Air Show in June. Pierre Verdy/AFP/Getty Images hide caption

itoggle caption Pierre Verdy/AFP/Getty Images

A local resident walks Wednesday near Osama bin Laden's compound in Abbottabad, Pakistan. The U.S. raid that killed bin Laden has been a source of tension in U.S.-Pakistani relations. Aqeel Ahmed/AP hide caption

itoggle caption Aqeel Ahmed/AP

Yemeni army soldiers, lifted by anti-government protesters, chant slogans and hold up their rifles as they celebrate President Ali Abdullah Saleh's departure to Saudi Arabia, in Sanaa, Yemen, on Sunday. Hani Mohammed/AP hide caption

itoggle caption Hani Mohammed/AP