allan shepard. with him, stuart roosa who would orbit the moon alone while edgar mitchell explored the surface. it was called fra mauro. apollo 13 aborted as it neared the moon had been unable to land at this site. now we were trying again. but why fra mauro? >> what happened to the moon during its first billion years? a period erased on earth? how did the earth and moon differ in overall composition? by visiting fra mauro, we hope to sample the very bed rock of the moon. material very different from that so far collected. material dating back to perhaps the beginning of the solar system. >> how can you think of the soil being 4.5 billion years old when the rocks which presumably underlie are only 3.7 billion years old. >> this site we suppose will be dramatically refuted or confirmed at the apollo 14 mission when they actually visit. >> most of the activity is associated with one place on the moon and we have tentatively located that place in or near the crater fra mauro. >> everything went smoothl