This was a very challenging IRAD study requiring many mission design reformulations as the science objectives evolved. When the study began in 2008, the goal was to visit the asteroid Apophis which astronomers had found to be on course for a close encounter with Earth in 2029, and possible impact in 2036. As the study moved forward, it became clear that a flight to Apophis was not feasible under the $450M cost cap of a Discovery mission. Since a secondary objective would use analysis of the spacecraft orbit to estimate the value of the Solar J2 gravitational term (which in turn would allow deeper understanding about the internal structure of the Sun) it was decided to make this a primary objective and look at sending spacecraft elsewhere to accomplish it. We began by looking at the asteroid Phaethon (as well as many others) which, like Apophis proved too expensive to get to. We then looked at sending a pair of spacecraft to Venus, one of which would go into orbit about Venus, the other would use a gravity assist at Venus and Earth to go on to Mars, where it would enter orbit. With two such spacecraft, triangulated tracking could reveal the Solar J2 and allow the science objective to be met. Finally, the project was renamed EAGLE as the objectives were shifted again to a high latitude laser altimetry experiment about Europa, the second inner most Galilean moon of Jupiter. In this formulation, several approaches were considered including everything from a direct entry into Europa orbit to orbiting and departing both Ganymede and Callisto (Jupiter’s outer most Galilean moons) before finally arriving at Europa. At this time, the study remains on hold pending a decision from NASA HQ as to how to proceed.