The Athena I, known as the Lockheed Launch Vehicle (LLV) at the time of its first flight and Lockheed Martin Launch Vehicle (LMLV) at the time of its second flight, is an American small expendable launch system which was used for four launches between 1995 and 2001. It is a member of the Athena family of rockets, along with the larger Athena II. The Athena I is a three-stage rocket, consisting of solid first and second stages, and a monopropellant liquid-fuelled third stage.