Lock n' Load with R. Lee Ermey is a television program on History that discussed the development of military weaponry throughout the centuries. It was hosted by R. Lee Ermey. In a typical episode, Ermey focused on one specific type of weapon or weapon system, presenting key advancements in its technology and demonstrating their use with the help of experts. In a holdover from his duties hosting Mail Call on the History Channel, he frequently added humor in the form of light-hearted drill instructor haranguing aimed at the viewer. He also displayed an eagerness to try out the episode's relevant weapons against a wide range of targets, particularly watermelons ("they taste better after being shot with a machine gun"), as well as glass bottles. The 13-episode series has been rerun semi-regularly since, with reruns currently airing on History 2. The pilot episode was produced by Simon J. Heath and edited by Simon Day (the lead singer of Australian punk band 'RatCat'). A rocket is a missile, spacecraft, aircraft or other vehicle that obtains thrust from a rocket engine. Rocket engine exhaust is formed entirely from propellants carried within the rocket before use.[1] Rocket engines work by action and reaction. Rocket engines push rockets forward simply by throwing their exhaust backwards extremely fast. While comparatively inefficient for low speed use, rockets are relatively lightweight and powerful, capable of generating large accelerations and of attaining extremely high speeds with reasonable efficiency. Rockets are not reliant on the atmosphere and work very well in space. Rockets for military and recreational uses date back to at least 13th century China.[2] Significant scientific, interplanetary and industrial use did not occur until the 20th century, when rocketry was the enabling technology of the Space Age, including setting foot on the moon. Rockets are now used for fireworks, weaponry, ejection seats, launch vehicles for artificial satellites, human spaceflight, and space exploration. Chemical rockets are the most common type of rocket[citation needed] and they typically create their exhaust by the combustion of rocket propellant. Chemical rockets store a large amount of energy in an easily released form, and can be very dangerous. However, careful design, testing, construction and use minimizes risks.

• published: 05 Jan 2014
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