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NASA Program to Find Asteroids Is Decade Behind Schedule

The U.S. space agency is a decade behind in meeting a congressional mandate to detect meteors capable of destroying a city, and needs a telescope in space to improve tracking, the nation’s top science officials said.

NASA’s leaders said most large asteroids that may trigger a global catastrophe have been found and tracked, and an impact within the next several centuries is unlikely. Smaller objects are harder to track, arrive more often and are less lethal.