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Speaking at the Human to Mars Summit, NASA's top administrator, Charles Bolden, pledges to work to "prevent an asteroid from colliding with devastating force into our planet."
If a meteor similar to the one that hit in Russia was on a path toward New York, we might be lucky to get even three weeks' warning, NASA's Charles Bolden Jr. says at a House Committee hearing.
Scientists have been wringing their hands over the possibility of asteroid Apophis crashing into the planet, but new data from a distant flyby diminishes the chances of an Earth impact.
Asteroid Apophis is expected to make a close encounter with Earth in 2029 and could be even closer in 2036.