Burning solid rocket propellant and bits of debris ejected from the flame duct at Space Launch Complex 37B during a Delta IV rocket launch, July 23, 2015 [1024×819][OC]

Burning solid rocket propellant and bits of debris ejected from the flame duct at Space Launch Complex 37B during a Delta IV rocket launch, July 23, 2015 [1024×819][OC]