Surveillance: Tracking multiple fruit flies

The science and engineering of tracking multiple missiles (which tend to move in fairly predictable paths) pales compared to this advance in surveillance:

Multi-camera Realtime 3D Tracking of Multiple Flying Animals“, Andrew D. Straw, Kristin Branson, Titus R. Neumann, Michael H. Dickinson, 2010, arXiv:1001.4297v1. (Thanks to Ben Stromquist.)

BONUS (thanks to David Kessler):

Improbable Research