Get serious, get together or get clobbered—this is the message from Nicholas Johnson, NASA's chief scientist for orbital debris and the top U.S. representative to the U.N. on the issue. The world's space-faring nations must forge a cooperative strategy for the costly and technically challenging elimination of orbital debris that poses a growing threat to strategically important robotic as well as manned spacecraft, Johnson says. Failure to address the issue methodically could place ...


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