A Quiver tree, or Kokerboom, (Aloe Dichotoma) in Richtersveld National Park; South Africa PacificStock
A U.S. Air Force F-22 Raptor is refueled by a KC-10A Extender aircraft over southwest Asia. StocktrekImages
An RC-135 Rivet Joint Reconnaissance aircraft receives fuel from a KC-135 Stratotanker. StocktrekImages