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Recently, astronauts on the ISS had to take shelter after a Russian anti-satellite weapon test created a dangerous cloud of space debris. Naturally, the US government is deeply concerned about the risk posed by space debris, this year’s NDAA even includes a directive to identify efforts to advance alternatives to Hall thrusters. So what’s wrong with Hall thrusters? Well to find out, I spoke to Dr. Natalya Bailey, founder and chief strategy officer for Accion Systems.