WEBVTT 00:00:03.589 --> 00:00:05.750 Racing worldwide and especially in NASCAR, 00:00:05.760 --> 00:00:08.369 we hear a lot about aerodynamics and wind tunnel testing. 00:00:08.380 --> 00:00:08.470 Well, 00:00:08.479 --> 00:00:10.010 welcome to a wind tunnel, 00:00:10.020 --> 00:00:11.670 wind shear in Concord, 00:00:11.680 --> 00:00:12.489 North Carolina, 00:00:12.500 --> 00:00:14.050 what ...