Louisiana's law requiring the Ten Commandments be posted in all public school classrooms was ruled unconstitutional by a federal appeals court Friday, according to the ACLU, a plaintiff in the case. Why it matters: The decision brings clarity to state schools after a confusing year in which state leaders and the courts have issued conflicting guidance on whether educators must abide by the law while the lawsuit was being resolved. The latest: A panel of three judges in the 5th Circuit Court of Appeals in New Orleans, widely considered one of the nation's most conservative, called the law "plainly unconstitutional."...