A small asteroid exploded in the air above a small town in Russia this morning, causing powerful shock waves that blew out windows over a wide area, and destroyed a few buildings. Several hundred people were injured, mostly by flying glass shards. Some of those were seriously injured.
It's not clear whether the Russian asteroid was connected in any way to the larger asteroid giving Earth a close shave this afternoon. Taken together, however, the two events might get the attention of world leaders, persuading them to start a planetary defense program. Earth is one of the larger targets in a shooting gallery. The longer we fail to defend the planet, the longer everything that has ever been accomplished by humans, and everything that could be accomplished, is at risk.
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