Whatever Fiona was flying felt hummingbird-swift, capable of brilliantly sudden pause and sustained hover, but also of elevator-like ascents and descents. All in the pale green monochrome of night vision. Her cameras were better than Milgrim’s, expensively optimized. Hollis, with no idea what it might look like, imagined it a huge dragonfly, its body the size of a baguette, the pulsing wings iridescent.