The U.S. space agency NASA has set a goal to return humans to the moon by 2024. As part of preparations NASA plans to send exploration vehicles to the moon to examine the planet’s huge water supply. The effort will follow up on a 2009 mission that confirmed the presence of water beneath the moon’s surface. That mission, called LCROSS, sent a rocket crashing into the moon’s south pole. The crash sent debris flying from the moon’s surface and identified a large collection of water ice. LCROSS was a major development in discovering this important resource on the moon. NASA Administrator Jim Bridenstine called the LCROSS mission “a game changer.” He said the U.S. “should have immediately as a nation changed our direction to the moon so we could figure out how to use it.”