ATLAS: The Asteroid Terrestrial-Impact Last Alert System
Using eight small telescopes, the asteroid detection system would scan the sky twice a night looking for objects moving through space. The plan is to have the system operational by the end of 2015. They predict their system could offer a one-week warning for a 50-yard diameter asteroid, or "City killer," and three weeks for a 150-yard-diameter "County killer." Ref. Source 2
Absolutely great. Being able to spot such objects will be a big step forward but will be useless if the national space agencies (not only Nasa, all of them) don't start to cooperate with the major Countries (and their Army) to find a way to stop or divert the big asteroids.