A big rocket. The V-2 (aka "A4" or "Aggregat 4") was built by Wernher von Braun's team of rocket scientists at Peenemünde for Nazi Germany during World War II. It was capable of delivering a 2,000 pound payload to a target up to 230 miles away. About 2,500 rockets were launched by the Nazis with about 500 of them aimed towards London.
A good website for V-2 information is:
http://www.v2rocket.com