NASA probes lead way back to moon

NASA embarks on a landmark mission of lunar exploration this week with the launch of probes to scout for water sources and landing sites, in a bid to lead humanity back on the first visit to the moon since 1972.The US space agency, with its eye on sending astronauts to Earth's natural satellite by 2020, is on course to blast off the dual LRO and LCROSS missions on Thursday atop an Atlas V rocket