The moon landing, the Beatles' first appearance on American TV and the Rev. Martin Luther King Jr.'s “I Have a Dream” speech are among the 75 Most Impactful Television Moments as ranked by the Television Academy before Monday's 75th edition of the Emmy Awards. Academy members from the television industry collaborated with academics to cull eight decades of TV history and vote on the list that was revealed Friday. Atop it they put Apollo 11's 1969 first landing on the moon, and Neil Armstrong's declaration of a "giant leap for mankind.” In second they put coverage of the 9/11 attacks...