Six Flags Entertainment Corp. is the world's largest amusement park corporation based on quantity of properties and the fifth most popular in terms of attendance. The company maintains 14 properties located throughout North America, including theme parks, thrill parks, water parks and family entertainment centers. In 2009, Six Flags properties hosted 23.9 million guests.

The company was founded in Texas and took its name from its first property, Six Flags Over Texas. The company maintains a corporate office in Midtown Manhattan, New York City and its headquarters are in Grand Prairie, Texas. On June 13, 2009, the corporation filed for Chapter 11 bankruptcy protection and successfully exited the restructuring 11 months later on May 3, 2010.

The name refers to the flags of the six different nations that have governed Texas: Spain, France, Mexico, the Republic of Texas, the United States of America, and the Confederate States of America. The original park was (and still is) split into separate regions, such as the Spain and Mexico section which featured Spanish-themed rides, attractions and buildings.

A flag is a piece of fabric with a distinctive design that is usually rectangular and used as a symbol, as a signaling device, or decoration. The term flag is also used to refer to the graphic design employed by a flag, or to its depiction in another medium.

The first flags were used to assist military coordination on battlefields, and flags have since evolved into a general tool for rudimentary signalling and identification, especially in environments where communication is similarly challenging (such as the maritime environment where semaphore is used). National flags are potent patriotic symbols with varied wide-ranging interpretations, often including strong military associations due to their original and ongoing military uses. Flags are also used in messaging, advertising, or for other decorative purposes. The study of flags is known as vexillology, from the Latin vexillum meaning flag or banner.

In antiquity, field signs or standards were used in warfare that can be categorized as vexilloid or "flag-like". Examples include the Achaemenid battle standard Derafsh Kaviani, and the standards of the Roman legions such as the eagle of Augustus Caesar's Xth legion, or the dragon standard of the Sarmatians; the latter was let fly freely in the wind, carried by a horseman, but judging from depictions it was more similar to an elongated dragon kite than to a simple flag.

Alexander "Lex" Joseph Luthor is a fictional character, a supervillain who appears in comic books published by DC Comics. He is the archenemy of Superman, and is also a major adversary of Batman and other superheroes in the DC Universe. Created by Jerry Siegel and Joe Shuster, he first appeared in Action Comics #23 (April 1940). Luthor is described as "a power-mad, evil scientist" of high intelligence and incredible technological prowess. His goals typically center on killing Superman, usually as a stepping stone to world domination. Though he periodically wears a powered exoskeleton, Luthor has traditionally lacked superpowers or a dual identity.

The character was originally depicted as a mad scientist who, in the vein of pulp novels, wreaks havoc on the world with his futuristic weaponry. In his earliest appearances, Luthor is shown with a full head of red hair; despite this, the character later became hairless as the result of an artist's mistake. A 1960 story by Jerry Siegel expanded upon Luthor's origin and motivations, revealing him to be a childhood friend of Superman's who lost his hair when a fire destroyed his laboratory; Luthor vowed revenge.