On April 14, 1865, an actor and Confederate sympathizer named John Wilkes Booth shot President Abraham Lincoln at Ford's Theatre in Washington. The following morning, less than a week after the end of the Civil War, Lincoln would become the first American president killed in office.
Launching rockets is a complicated thing. Landing them upright on a platform floating in the ocean? Well, that's never been done before. But SpaceX, the private space exploration company founded by billionaire Elon Musk, plans to give it a try Monday.