• A drone belonging to the Ezzedine al-Qassam Brigades, Hamas' armed wing, flies over Gaza City on December 14, 2014 during a parade by Palestinian militants marking the 27th anniversary of the Islamist movement’s creation.
  • F-35
  • An advanced Global Hawk surveillance drone is displayed outside its hangar at Misawa Air Base in northern Japan Friday, May 30, 2014.
  • Sukhoi T-50 PAK FA Prototype
  • Two separate US government watchdogs are outlining problems with the engines used in their F-35 jet fighters - one finding the systems unreliable and another citing dozens of violations in its quality assurance inspection.
  • Su-30MK
  • AMX ITAF
  • Syrian pro-government forces prepare their weapons at a train station in the area of Arkile near the airport of Kweyris, in the northern Syrian province of Aleppo, on November 20, 2015
  • Sukhoi T-50 PAK FA
  • US Air Force shows an F-117 Nighthawk stealth fighter
  • Sukhoi T-50 PAK FA
  • It may be seven years late and $160 billion over budget, but the F-35 fighter - the most expensive piece of fighting equipment in history - may finally make its official debut this summer.
  • Norwegian Air Force F-16AM
  • PAC JF-17 Thunder multirole combat aircraft
  • Northrop Grumman B-2 Spirit AV-2, Spirit of Arizona - 82-1067