A street of shattered buildings is viewed partially through a mirror used by rebel fighters to keep an eye on their enemy's positions in the Karm al-Jabel battlefield in Aleppo, Syria, on Sunday, Oct. 28, 2012. Syria's air force fired missiles and dropped barrel bombs on rebel strongholds while opposition fighters attacked regime positions, flouting a U.N.-backed cease-fire that was supposed to quiet fighting over a long holiday weekend but never took hold. (AP Photo/Narciso Contreras)

Photo by: Narciso Contreras

A street of shattered buildings is viewed partially through a mirror used by rebel fighters to keep an eye on their enemy's positions in the Karm al-Jabel battlefield in Aleppo, Syria, on Sunday, Oct. 28, 2012. Syria's air force fired missiles and dropped barrel bombs on rebel strongholds while opposition fighters attacked regime positions, flouting a U.N.-backed cease-fire that was supposed to quiet fighting over a long holiday weekend but never took hold. (AP Photo/Narciso Contreras)