ISTANBUL The US military is "likely" responsible for the Feb. 28 bombing of a girls' school in Iran that killed some 168 people, most of them children, US media reported Monday, citing sources briefed on a preliminary intelligence assessment. The assessment suggests the school was not intentionally targeted and may have been struck by mistake, possibly due to outdated intelligence that identified the area as still part of a military base, a source told CBS News. Two sources told the outlet that