US ambassador to Libya, Chris Stevens, in the hands of Libyans. John Christopher “Chris” Stevens was an American diplomat and lawyer who served as the U.S. Ambassador to Libya from June 2012 to September 2012. He was killed when the U.S. consulate was attacked in Benghazi, Libya, on September 11, 2012.

Transfer cases are carried into a hangar during the Transfer of Remains Ceremony marking the return to the United States of the remains of the four Americans killed this week in Benghazi, Libya, at Joint Base Andrews. (Photo by Molly Riley/Polaris via Abaca Press/MCT)

President Barack Obama and Secretary of State Hillary Clinton walk away from the podium during the Transfer of Remains Ceremony marking the return to the United States of the remains of the four Americans killed this week in Benghazi, Libya, at Joint Base Andrews. (Photo by Molly Riley/Polaris via Abaca Press/MCT)

Duncan Currie signs a condolence book for J. Christopher Stevens, U.S. Ambassador to Libya, who was killed Tuesday during an attack in Behghazi, at the U.S. Capitol in Washington. (Photo by Brendan Hoffman/The New York Times)

Supporters bow their heads as Republican presidential candidate and former Massachusetts Governor Mitt Romney holds a moment of silence for the embassy officials killed in Libya, as he campaigns in the rain at Lake Erie College in Painesville, Ohio. (Photo by Charles Dharapak/Associated Press)

Dilan Samo, 13, holds a picture of slain U.S. ambassador to Libya Christopher Stevens during a candlelight vigil outside the Libyan Embassy in New York. (Photo by John Minchillo/Associated Press)

Protesters assist an injured comrade during clashes with security forces near the U.S. embassy in Cairo, Egypt. (Photo by Khalil Hamra/Associated Press)

Protesters clash with security forces near the U.S. Embassy in Cairo, Egypt. (Photo by Khalil Hamra/Associated Press)

A man walks on the flag during a protest in Hyderabad, India , against an anti-Islam movie called “Innocence of Muslims” that mocked Islam's Prophet Muhammad. (Photo by Mahesh Kumar A./Associated Press)

In Cairo, protesters clash with police in front of the U.S. embassy early Thursday, as part of widespread anger across the Muslim world about a film ridiculing Islam's Prophet Muhammad. (Photo by Mohammed Abu Zaid/Associated Press)

A protester tries to recuperate from tear gas inhalation during clashes with police in Cairo. (Photo by Tara Todras-Whitehill/The New York Times)

A boy holds a toy gun during a protest about a film ridiculing Islam's Prophet Muhammad in the Palestinian refugee camp of Ain el-Hilweh near Sidon, Lebanon, September 14, 2012. (Photo by Mohammed Zaatari/Associated Press)

A man investigates the inside of the U.S. Consulate in Benghazi on Thursday. (Photo by Mohammad Hannon/Associated Press)

Tunisian protesters lower and burn an American flag as they replace it with an Islamic flag during a demonstration against a film deemed offensive to Islam, outside the U.S. Embassy in Tunis on Sept. 12. A purported portrayal of the life of the Prophet Mohammed in the low-budget “Innocence of Muslims” movie sparked protests all around the Middle East this week. (Photo by AFP Photo)

Protesters clash with security forces near the U.S. Embassy in Cairo, Egypt. (Photo by Khalil Hamra/Associated Press)

A protester runs from tear gas fired by police in Cairo. (Photo by Tara Todras-Whitehill/The New York Times)

A protester flashes the victory sign next to a burning police car during clashes near the U.S. embassy in Cairo, where potesters clashed with police for the third day in a row. Egypt's Islamist President Mohammed Morsi vowed to protect foreign embassies in Cairo, where police were using tear gas to disperse protesters at the U.S. mission. (Photo by Khalil Hamra/Associated Press)

Protesters storm the gate of the U.S. Embassy in Sanaa, Yemen on Thursday. (Photo by Hani Mohammed/Associated Press)

A man explains that the bloodstains on the column are from one of the American staff members who grabbed the edge of the column while he was evacuated after the attack that killed four Americans, including Ambassador Chris Stevens, on Tuesday night in Benghazi. The Arabic writing on the column reads “Villa of Jamal al Beshary”, which was written by the owner to protect the property from another attack. (Photo by Mohammad Hannon/Associated Press)

Inside the grounds of the embassy in Sanaa, protesters break the windows of a door. (Photo by Hani Mohammed/Associated Press)

Protesters break the windows of the U.S. embassy in Sanaa September 13, 2012. Hundreds of Yemeni demonstrators stormed the U.S. embassy in Sanaa on Thursday in protest against a film they consider blasphemous to Islam, and security guards tried to hold them off by firing into the air. Yemen's embassy in Washington said no casualties were reported when the protesters stormed the U.S. embassy compound in Sanaa on Thursday. (Photo by Khaled Abdullah/Reuters)

A protester and police throw stones at each other during clashes in Cairo. For all the harrowing images of the deadly attack on the American mission in Benghazi, Libya, and the American Embassy in Cairo coming under siege from protesters Tuesday, the Obama administration is grappling with the possibility that its far bigger long-term problem lies in Egypt, not Libya. (Photo by Tara Todras-Whitehill/The New York Times)

Protesters carry their national flag and a flag with Arabic that reads “No God but Allah, and Muhammad is his prophet”, and chant anti-U.S. slogans during a demonstration in front of the U.S. embassy in Cairo, Egypt, as part of widespread anger across the Muslim world about a film ridiculing Islam's Prophet Muhammad. (Photo by Nasser Nasser/Associated Press)

Egyptian protesters evacuate an injured youth toward a waiting ambulance during clashes with security forces near the U.S. Embassy in Cairo, Egypt, on September 14, 2012. (Photo by Nasser Nasser/Associated Press)

A protester holds a poster of the late revolutionary founder Ayatollah Khomeini during a demonstration against the film ridiculing Islam's Prophet Muhammad, in front of the Swiss Embassy in Tehran, which represents U.S. interests in Iran. (Photo by Vahid Salemi/Associated Press)

Iranian worshippers chant slogans during a protest after their Friday prayer, as part of widespread anger across the Muslim world about a film ridiculing Islam's Prophet Muhammad on September 14, 2012. (Photo by Vahid Salemi/Associated Press)

Protesters chant slogans amid orange smoke outside the U.S. embassy in Cairo. Egyptian protesters, largely ultra-conservative Islamists, climbed the walls of the U.S. embassy, went into the courtyard and brought down the flag, replacing it with a black flag with Islamic inscription, in protest of a film deemed offensive to Islam. (Photo by Mohammed Abu Zaid/Associated Press)

An injured protester takes cover behind a metal barrier during clashes with riot police behind cement blocks that are used to close the street leading to the U.S. Embassy in Cairo, Egypt. (Photo by Nasser Nasser\Associated Press)

Tunisian protesters lower and burn an American flag as they replace it with an Islamic flag during a demonstration against a film deemed offensive to Islam, outside the U.S. Embassy in Tunis on September 12, 2012. (Photo by AFP Photo)