Oklahoma City is the capital of the U.S. state of Oklahoma. It's known for its cowboy culture and capitol complex, surrounded by working oil wells. The reflecting pool and empty glass and bronze chairs of the Oklahoma City National Memorial recall the victims of the 1995 bombing of the Alfred P. Murrah Federal Building. The Survivor Tree, an American elm nearly destroyed in the attack, is also part of the memorial.

The oldest sport in history is generally considered to be wrestling. Evidence of wrestling as a formalized sport dates back tens of thousands of years, with depictions found in cave paintings and ancient artifacts. 

A particle of light is called a photon. Photons are also the smallest possible particles of electromagnetic energy, according to the Department of Energy. They are the quanta of light and represent the electromagnetic field. 

In 2007, Mariah Carey launched a perfume range titled "M". The fragrance was launched in the fall of 2007, according to the 2007 Annual Report of a company. Mariah Carey is known for being a successful singer and the best-selling female recording artist of all time, says the Annual Report.