Photo credits: 
  • Banner - Antonio Litterio derivative work: InverseHypercube  (via Wikimedia Commons)
  • Top left - Photo courtesy of USDA Natural Resources Conservation Service (via Wikimedia Commons)
  • Top center - Photo courtesy of Global Jet (via Wikimedia Commons)

  • Top right - Photo courtesy of Rapidfire (via Wikimedia Commons)
  • Bottom left - Photo courtesy of Gref Neault (via Wikimedia Commons)
  • Bottom center - Photo courtesy of Clément Bucco-Lechat (via Wikimedia Commons)
  • Bottom right - Photo courtesy of Jim Hood (via Wikimedia Commons)