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" The dust is in the air,” Donald said. He leaned against the counter, his knees weak. The nanos eating away at mankind, they were loosed on the world with every cleaning, little puffs like clockwork, tick-tock with each exile. The headphones sat there quietly. “I am an ancient,” Donald said, using her words. He grabbed the headphones from the desk and repeated into the microphone, loudly, “I am an ancient! I did this!” He sagged once more against the desk, catching himself before he fell. “I’m sorry,” he muttered. “I’m sorry, I’m sorry.” Louder, yelling it: “I’m sorry!” But nobody was listening. "
― Hugh Howey , Dust (Silo, #3)