sentences:  These studies were made before the discovery of water ice (5.6 ± 2.9% by mass) in a polar crater, which may substantially affect plans.The International Lunar Resources Exploration Concept (ILREC) was a proposed mission architecture under President George H. W. Bush's Space Exploration Initiative (SEI) by Kent Joosten, an engineer at Johnson Space Center.The plan would have used the help of international partners, mainly Soviet Union, to assemble a lunar base and sustainable lunar transportation service.