The Pentagon

The Pentagon is the headquarters of the United States Department of Defense, located in Arlington County, Virginia. As a symbol of the U.S. military, "The Pentagon" is often used metonymically to refer to the U.S. Department of Defense.

The Pentagon was designed by American architect George Bergstrom (1876–1955), and built by general contractor John McShain of Philadelphia. Ground was broken for construction on September 11, 1941, and the building was dedicated on January 15, 1943. General Brehon Somervell provided the major motive power behind the project; Colonel Leslie Groves was responsible for overseeing the project for the U.S. Army.

The Pentagon is a large office building, with about 6,500,000 sq ft (600,000 m²), of which 3,700,000 sq ft (340,000 m²) are used as offices. Approximately 23,000 military and civilian employees and about 3,000 non-defense support personnel work in the Pentagon. It has five sides, five floors above ground, two basement levels, and five ring corridors per floor with a total of 17.5 mi (28.2 km) of corridors. The Pentagon includes a five-acre (20,000 m²) central plaza, which is shaped like a pentagon and informally known as "ground zero", a nickname originating during the Cold War on the presumption that it would be targeted by the Soviet Union at the outbreak of nuclear war.

Pentagon

In geometry, a pentagon (from the Greek πέντε pente and γωνία gonia, meaning five and angle) is any five-sided polygon or 5-gon. The sum of the internal angles in a simple pentagon is 540°.

A pentagon may be simple or self-intersecting. A self-intersecting regular pentagon (or star pentagon) is called a pentagram.

Regular pentagons

A regular pentagon has Schläfli symbol {5} and interior angles are 108°.

A regular pentagon has five lines of reflectional symmetry, and rotational symmetry of order 5 (through 72°, 144°, 216° and 288°). The diagonals of a convex regular pentagon are in the golden ratio to its sides. Its height (distance from one side to the opposite vertex) and width (distance between two farthest separated points, which equals the diagonal length) are given by

where R is the radius of the circumcircle.

The area of a convex regular convex pentagon with side length t is given by

A pentagram or pentangle is a regular star pentagon. Its Schläfli symbol is {5/2}. Its sides form the diagonals of a regular convex pentagon – in this arrangement the sides of the two pentagons are in the golden ratio.

Late Night

Late Night is shorthand for several different things:

See also

United States Department of Defense

The Department of Defense (DoD,USDOD, or DOD) is an executive branch department of the federal government of the United States charged with coordinating and supervising all agencies and functions of the government concerned directly with national security and the United States Armed Forces. The Department is also the largest employer in the world, with more than 2.13 million active duty servicemen and women as well as their support staff of civilian workers. Adding to the total is over 1.1 million National Guardsmen and Reservists from the four services, bringing the total to just over 3.2 million employees. It is headquartered at the Pentagon in Arlington, Virginia, just outside of Washington D.C.

The Department of Defense is headed by the Secretary of Defense, a cabinet-level head who reports directly to the President of the United States. Beneath the Department of Defense are three subordinate military departments: the United States Department of the Army, the United States Department of the Navy, and the United States Department of the Air Force. In addition, four national intelligence services are subordinate to the Department of Defense: the Defense Intelligence Agency (DIA), the National Security Agency (NSA), the National Geospatial-Intelligence Agency (NGA), and the National Reconnaissance Office (NRO). Other Defense Agencies include the Defense Advanced Research Projects Agency (DARPA), the Defense Logistics Agency (DLA), the Missile Defense Agency (MDA), Defense Threat Reduction Agency (DTRA), and the Pentagon Force Protection Agency (PFPA), all of which are under the command of the Secretary of Defense. Military operations are managed by nine regional or functional Unified Combatant Commands. The Department of Defense also operates several joint services schools, including the National Defense University (NDU) and the National War College (NWC).

Seth Meyers

Seth Adam Meyers (born December 28, 1973) is an American comedian, writer, producer, television host, actor, and voice actor. He currently hosts Late Night with Seth Meyers, a late-night talk show that airs on NBC. Prior to that, he was a head writer for NBC's Saturday Night Live (2001–2014) and hosted its news parody segment Weekend Update.

He also hosted the 66th Primetime Emmy Awards in 2014, starred in the animated Hulu series The Awesomes (2013–2015), appeared in Journey to the Center of the Earth (2008), and is the co-creator, co-writer, and executive producer of Documentary Now! (2015–present)

Early life

Meyers was born in Evanston, Illinois, and was raised in Okemos, Michigan from ages 4–10 and Bedford, New Hampshire after that. His mother, Hilary Claire (née Olson), was a French teacher, and his father, Laurence Meyers, Jr., worked in finance. His younger brother is actor Josh Meyers. His paternal grandfather was Jewish, and although Meyers has performed at several Jewish Community Centers, he does not consider himself Jewish. His other ancestry is Czech-Austrian (from his paternal grandmother), Swedish, English, and German. Meyers attended Edgewood Elementary in Okemos and later graduated from Manchester High School West in New Hampshire. He then attended and graduated from Northwestern University in Evanston, where he became a member of the fraternity Phi Gamma Delta.