A military assessment suggests a U.S. Tomahawk cruise missile was responsible for at least 165 deaths at an Iranian girls' school, according to a U.S. official who was not authorized to speak publicly. The U.S. has launched a formal investigation into a missile strike on an Iranian girls' school that killed at least 165 civilians, many of them children, after a preliminary assessment determined the U.S. was at fault, according to a U.S. official wh... [4350 chars]