1/12In this Saturday, Dec. 15, 2012 photo, Free Syrian Army fighters aim their weapons as they chant religious slogans during heavy clashes with government forces at a military academy besieged by the rebels north of Aleppo, Syria.
U.N. Secretary-General Ban Ki-moon condemned the escalation of violence in Syria, saying reports of government warplanes bombing a Palestinian refugee camp are of "grave concern."
2/12Syria, deaths from conflict, updated December 20, 2012
U.N. Secretary-General Ban Ki-moon condemned the escalation of violence in Syria, saying reports of government warplanes bombing a Palestinian refugee camp are of "grave concern."
3/12Syrian people seen near a damaged building after it was attacked by a Syrian Army Jet in Azaz, Syria, Sunday, Dec 16, 2012.
U.N. Secretary-General Ban Ki-moon condemned the escalation of violence in Syria, saying reports of government warplanes bombing a Palestinian refugee camp are of "grave concern."
4/12People near a damaged building after it was attacked by a Syrian Army jet in Azaz, Syria, December 16, 2012.
U.N. Secretary-General Ban Ki-moon condemned the escalation of violence in Syria, saying reports of government warplanes bombing a Palestinian refugee camp are of "grave concern."
5/12Damaged buildings are seen in Al-Khalidiya neighborhood of Homs, Syria, December 16, 2012.
U.N. Secretary-General Ban Ki-moon condemned the escalation of violence in Syria, saying reports of government warplanes bombing a Palestinian refugee camp are of "grave concern."
6/12A Free Syrian Army fighter carries his weapon as he walks along a damaged street in Aleppo's Khan al-Wazeer district, Syria, December 16, 2012.
U.N. Secretary-General Ban Ki-moon condemned the escalation of violence in Syria, saying reports of government warplanes bombing a Palestinian refugee camp are of "grave concern."
7/12Free Syrian Army fighters pose with a tank after capturing the Military Infantry School following heavy clashes, Aleppo, Syria, December 16, 2012.
U.N. Secretary-General Ban Ki-moon condemned the escalation of violence in Syria, saying reports of government warplanes bombing a Palestinian refugee camp are of "grave concern."
8/12In this Saturday, Dec. 15, 2012 photo, Free Syrian Army fighters react after an explosion during heavy clashes with government forces at a military academy besieged by the rebels north of Aleppo, Syria.
U.N. Secretary-General Ban Ki-moon condemned the escalation of violence in Syria, saying reports of government warplanes bombing a Palestinian refugee camp are of "grave concern."
9/12Islamist fighters carry their flag during the funeral of their fellow fighter Tareq Naser, who died during clashes on Sunday, near the village of Fafeen in Aleppo's countryside September 17, 2012. REUTERS/Zain Karam (SYRIA - Tags: POLITICS CONFLICT)
U.N. Secretary-General Ban Ki-moon condemned the escalation of violence in Syria, saying reports of government warplanes bombing a Palestinian refugee camp are of "grave concern."
10/12Overseas Filipino Workers (OFWs), fleeing the civil war in Syria, cheer upon arrival at the Ninoy Aquino International Airport via a chartered flight by International Organization for Migration Thursday Oct. 18, 2012 in Manila, Philippines. Of the 261 OFW
U.N. Secretary-General Ban Ki-moon condemned the escalation of violence in Syria, saying reports of government warplanes bombing a Palestinian refugee camp are of "grave concern."
11/12In this Thursday, Dec. 13, 2012 photo, Syrian rebels pose for a photo in Aleppo, Syria.
U.N. Secretary-General Ban Ki-moon condemned the escalation of violence in Syria, saying reports of government warplanes bombing a Palestinian refugee camp are of "grave concern."
12/12A Free Syrian Army sniper fires his rifle towards Syrian Army positions during an assault on a military base in Tal Sheen, Syria, Saturday, Dec 15, 2012
U.N. Secretary-General Ban Ki-moon condemned the escalation of violence in Syria, saying reports of government warplanes bombing a Palestinian refugee camp are of "grave concern."
