Lakhdar Brahimi (from right), the U.N.-Arab League envoy to Syria; former Irish President Mary Robinson; former U.S. President Jimmy Carter; Arab League Secretary-General Nabil Elaraby; and former Norwegian Prime Minister Gro Harlem Brundtland attend a press conference after their meeting at the Arab League headquarters in Cairo on Wednesday, Oct. 24, 2012. Mr. Brahimi says the Syrian government and some rebel leaders have agreed to a cease-fire during the upcoming four-day Muslim holiday. (AP Photo/Nasser Nasser)

Photo by: Nasser Nasser

Lakhdar Brahimi (from right), the U.N.-Arab League envoy to Syria; former Irish President Mary Robinson; former U.S. President Jimmy Carter; Arab League Secretary-General Nabil Elaraby; and former Norwegian Prime Minister Gro Harlem Brundtland attend a press conference after their meeting at the Arab League headquarters in Cairo on Wednesday, Oct. 24, 2012. Mr. Brahimi says the Syrian government and some rebel leaders have agreed to a cease-fire during the upcoming four-day Muslim holiday. (AP Photo/Nasser Nasser)