The Sikorsky Cypher and Cypher II are types of unmanned aerial vehicles developed by Sikorsky Aircraft Corporation. They are vertical takeoff and landing aircraft which use two opposing rotors enclosed in a circular shroud for propulsion.

In the late 1980s, Sikorsky Aircraft flew a small UAV named "Cypher", with coaxial rotors inside a torus-shaped airframe. The torus shroud improved handling safety and also helped increase lift. The first proof-of-concept Cypher was 1.75 meters (5.75 feet) in diameter and 55 centimeters (1.8 feet) tall, weighed 20 kilograms (43 pounds), and was first flown in the summer of 1988. This design was powered by a four-stroke, 2.85 kW (3.8 hp) engine and was mounted on a truck for forward-flight tests.[Wikipedia]

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The MQ-1 Predator is an unmanned aerial vehicle (UAV) which the United States Air Force describes as a MALE (medium-altitude, long-endurance) UAV system. It can serve in a reconnaissance role and fire two AGM-114 Hellfire missiles. The aircraft, in use since 1995, has seen combat over Afghanistan, Pakistan, Bosnia, Serbia, Iraq, and Yemen. It is a remote-controlled aircraft.

The MQ-1 Predator is a system, not just an aircraft. The fully operational system consists of four air vehicles (with sensors), a ground control station (GCS), a Predator primary satellite link communication suite, and 55 people. In the over-all U.S. Air Force integrated UAV system the Predator is considered a "Tier II" vehicle  [Wikipedia]

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The United States Navy's Navy Flight Demonstration Squadron, popularly known as the Blue Angels, first performed in 1946 and was the world's first officially sanctioned military aerial demonstration team.The squadron's six demonstration pilots fly the Boeing F/A-18 Hornet in more than 70 shows at 34 locations throughout the United States each year, where they still employ many of the same practices and techniques used in their aerial displays in 1946. Since their inception, the "Blues" have flown a variety of different aircraft types for more than 427 million spectators worldwide. The mission of the Blue Angels is to enhance Navy recruiting, and credibly represent Navy and Marine Corps aviation to the United States and its Armed Forces to America and other countries as international ambassadors of good will. [Wikipedia]

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