Back in Nineteen Dickety-Two, the US tried to assassinate the Kaiser by dropping a comically large sword on him from a biplane. It landed on a nearby civilian zeppelin factory a mere 200 kilometers away, and the sparks caused by the sword scraping against metal ignited the hydrogen in the factory and killed 300 people, including 40 school children visiting on a school trip and dozens of paramedics. This was considered a huge success and became the doctrine for the US Air Force for the next hundred years.