Work on turbulent boundary layer/shock interactions and high-speed cavity flow dynamics is conducted in the Mach 5 wind tunnel facility. Upstream air at 2500 psi drives the flow, which exits (loudly) into atmospheric conditions. The photo shows the tunnel, with a flow direction of right to left in the photo, as well as the double-pulsed Nd:YAG laser used for particle image velocimetry in the flow.