Air force

An air force, also known in some countries as an air army, is in the broadest sense, the national military organization that primarily conducts aerial warfare. More specifically, it is the branch of a nation's armed services that is responsible for aerial warfare as distinct from an army, navy, or a marine corps. Typically, air forces are responsible for gaining control of the air, carrying out strategic and tactical bombing missions, and providing support to land and naval forces.

The term "air force" may also refer to a tactical air force or numbered air force, which is an operational formation either within a national air force or comprising several air components from allied nations. Air forces typically consist of a combination of fighters, bombers, helicopters, transport planes and other aircraft.

Many air forces are also responsible for operations of the military space, intercontinental ballistic missiles (ICBM), and communications equipment. Some air forces may command and control other air defence assets such as anti-aircraft artillery, surface-to-air missiles, or anti-ballistic missile warning networks and defensive systems. Some nations, principally Russia, the former Soviet Union and countries who modelled their militaries along Soviet lines, have an air defence force which is organizationally separate from their air force.

Kevin P. Chilton

Kevin Patrick "Chilli" Chilton (born November 3, 1954) is an American mechanical engineer, and former United States Air Force four-star General and test pilot. His last assignment was as Commander, U.S. Strategic Command from October 3, 2007 to January 28, 2011. Prior to his appointment to general officer ranks, Chilton spent 11 years of his military career as a NASA astronaut. He retired from the Air Force on February 1, 2011, after having achieved the highest rank of any military astronaut. On January 30, 2012, General Chilton was named to the board of directors of Orbital Sciences Corporation.

Early life

Born November 3, 1954, in Los Angeles, California, he graduated from St. Bernard High School, Playa del Rey, California, in 1972. He received a Bachelor of Science degree in Engineering Sciences from the United States Air Force Academy in 1976, and an Master of Science degree in Mechanical Engineering from Columbia University on a Guggenheim Fellowship in 1977. He enjoys reading and all sports, including running, snow skiing, sailing, and softball.

Kevin

Kevin (/ˈkɛv.ɪn/; Irish: Caoimhín [kiː.vʲiːnʲ], Middle Irish: Caoimhghín [kəiṽʲ.ʝiːnʲ], Old Irish: Cóemgein [koiṽʲ.ɣʲinʲ], Scottish Gaelic: Caomhainn, Latin: Coemgenus) is a male first name of Goidelic origin. Among the earliest famous bearers of the name was Saint Kevin, although Kevin is not a biblical name. Caoimhghín derives from the Irish caomh (Old Irish cóem) "kind, honest, handsome" and -gin (Old Irish gein) "birth". Kevin influenced the similarly Irish-derived Kelvin, as well as the Latin Calvin. "Kevin" is one of the top 100 male baby names in Chile, France, Hungary, Ireland, the Netherlands, Northern Ireland, Norway, Slovenia, Sweden and the United States. It can also be spelled Kevyn, Keven, or Kevan.

In the United Kingdom, its popularity peaked during the 1950s and 1960s, when it was frequently among the 20 most popular male first names, but by the 1990s it had fallen out of the top 100. In France, the name was very popular during the 1980s and 1990s, especially in the lower class. There is wide variation both on the pronunciation and accentation. A more Franco-Celtic pronunciation is often written as Kévin, while a consciously Anglo-American pronunciation is written without the accent. For example, French horseman Kevin Staut's and French runner Kévin Hautcœur's official websites differ, though the French media may pronounce both names similarly.

General officer

A general officer is an officer of high rank in the army, and in some nations' air forces or marines.

The term "general" is used in two ways: as the generic title for all grades of general officer and as a specific rank. It originates in the 16th century, as a shortening of captain general, which rank was taken from Middle French capitaine général. The adjective general had been affixed to officer designations since the late medieval period to indicate relative superiority or an extended jurisdiction.

Today, the title of "General" is known in some countries as a four-star rank. However different countries use different systems of stars for senior ranks. It has a NATO code of OF-9 and is the highest rank currently in use in a number of armies.

General officer ranks

The various grades of general officer are at the top of the military rank structure. Lower-ranking officers in land-centric military forces are typically known as field officers or field-grade officers, and below them are company-grade officers.

Space Shuttle

The Space Shuttle was a partially reusable low Earth orbital spacecraft system operated by the U.S. National Aeronautics and Space Administration (NASA), as part of the Space Shuttle program. Its official program name was Space Transportation System (STS), taken from a 1969 plan for a system of reusable spacecraft of which it was the only item funded for development. The first of four orbital test flights occurred in 1981, leading to operational flights beginning in 1982. They were used on a total of 135 missions from 1981 to 2011, launched from the Kennedy Space Center (KSC) in Florida. Operational missions launched numerous satellites, interplanetary probes, and the Hubble Space Telescope (HST); conducted science experiments in orbit; and participated in construction and servicing of the International Space Station. The Shuttle fleet's total mission time was 1322 days, 19 hours, 21 minutes and 23 seconds.

Shuttle components included the Orbiter Vehicle (OV), a pair of recoverable solid rocket boosters (SRBs), and the expendable external tank (ET) containing liquid hydrogen and liquid oxygen. The Shuttle was launched vertically, like a conventional rocket, with the two SRBs operating in parallel with the OV's three main engines, which were fueled from the ET. The SRBs were jettisoned before the vehicle reached orbit, and the ET was jettisoned just before orbit insertion, which used the orbiter's two Orbital Maneuvering System (OMS) engines. At the conclusion of the mission, the orbiter fired its OMS to de-orbit and re-enter the atmosphere. The orbiter then glided as a spaceplane to a runway landing, usually at the Shuttle Landing Facility of KSC or Rogers Dry Lake in Edwards Air Force Base, California. After landing at Edwards, the orbiter was flown back to the KSC on the Shuttle Carrier Aircraft, a specially modified Boeing 747.