Moon-Smashing Probes: Are the Data Worth the Damage?

http://news.nationalgeographic.com/news/2009/03/090306-moon-crash-nasa.html

NASA scientists a new moon smashing mission, which is becoming known as a decade long tradition. This is being done for future lunar exploration, to determine if there is reservoirs of ice on the moon. Scientists warn that any time you hit the moon with such severe impact, the impact would obviously causes damage and when you hit it so many times. However, lunar sample experts disagree, and say that meteors crash at around 15 miles a second, ten times more any human impact, which wreaks a lot more havoc on the lunar surface. Also because the moon has no athmosphere, the debris won't move around and contaminate anything.