Errinwright, looking stricken, goes to see Avasarala. He tells her he believes Ganymede was a test for a weapon that was made by Jules-Pierre Mao. He knows this, he says, because he's been working with Mao. He tries to justify that this was about trying to keep Earth safe, but Avasarala won't let him off the hook so easily. He hands over all the information he has and says he thinks Ganymede was just the beginning.