"It was—until this," Hu said, and freeze-framed the video. It wasn’t easy to make out, but they could see a tiny flash on the forward halo of Arklet 214. "The thruster fires—a small course correction under automatic control." He stepped it forward. The flash faded but expanded into a dim gray cloud. "Exhaust gases. Expanding rapidly but moving quite fast." He stepped it forward several more frames until they could see the thermal protection blanket recoiling from the impact of the gas. A seam parted between two adjoining blankets and one of them flailed out like a rag caught in a wind gust.