Two Grumman 7F7 Tigercat escorts sprang alive with smoke billowing from their twin Pratt & Whitney radial engines as we launched in a twin-engine, twin-tail North American B–25 Mitchell bomber, its silhouette casting distinctive shadows over EAA AirVenture Oshkosh in Wisconsin during a sunrise sortie from Warbird Alley.
Source: aopaAirVenture awakened by warbird thunder