alt Hacker NewsI don't believe the U.S military was involved with that school massacre. Reports have it that it was some Israeli missile. The U.S would sell weapons knowing full well it could happen but would never (knowingly) do such a thing.
All that said, not sure there should be any sympathy for soldiers bombing any country on the pretext of some "preventive" war.
It was extremely likely a tomahawk missile which Israel do not use. It was almost certainly the US. There are many many journalists who have written about it