Associated Press
FILE - In this Friday, Aug. 17, 2012 file photo, a Syrian man walks by a building destroyed in an airstrike in Aleppo, Syria. The growing use of air power by the Syrian regime is causing a spike in civilian casualties, according to activists. Its forces stretched thin on multiple fronts, President Bashar Assad's regime has significantly increased its use of air power against Syrian rebels in recent weeks, causing mounting civilian casualties. The shift is providing useful clues about the capability of the air force as Western powers consider the option of enforcing a no-fly zone over the northern part of the country.(AP Photo/Khalil Hamra, File)

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