More: 5 arrested following violence at Donald Trump's cancelled Chicago rally; 2 arrests made by Chicago Police, 2 arrested by University of Illinois at Chicago Police, and CBS News reporter Sopan Deb arrested by Illinois State Police, says Chicago Police Superintendent John Escalante
Editor's note: Former Virginia Gov. Jim Gilmore ends his GOP presidential bid after a poor performance in both New Hampshire and Iowa. In New Hampshire, he received only 133 votes. Gilmore was set to be the only remaining Republican candidate left out of CBS' debate on Saturday, Politico reports. Donald Trump, Ted Cruz, Marco Rubio, Jeb Bush, Ben Carson and John Kasich all remain in the GOP race. - Stephanie
Editor's note: Sumner Redstone, who is stepping down as executive chairman of CBS, is 92 and is the subject of a court case challenging his mental competence. Redstone acquired CBS through an acquisition in 2000. - Tom
CBS (an initialism of the network's former name, the Columbia Broadcasting System) is an American commercial broadcast television network that is the flagship properties of CBS Corporation. The company is headquartered at the CBS Building in New York City with major production facilities and operations in New York City (at the CBS Broadcast Center) and Los Angeles (at CBS Television City and the CBS Studio Center).
CBS is sometimes referred to as the "Eye Network", in reference to the company's iconic logo, in use since 1951. It has also been called the "Tiffany Network", alluding to the perceived high quality of CBS programming during the tenure of its founder William S. Paley. It can also refer to some of CBS's first demonstrations of color television, which were held in a former Tiffany & Co. building in New York City in 1950.
The network has its origins in United Independent Broadcasters Inc., a collection of 16 radio stations that was purchased by Paley in 1928 and renamed the Columbia Broadcasting System. Under Paley's guidance, CBS would first become one of the largest radio networks in the United States, and eventually one of the Big Three American broadcast television networks. In 1974, CBS dropped its former full name and became known simply as CBS, Inc. The Westinghouse Electric Corporation acquired the network in 1995, renamed its corporate entity to the current CBS Broadcasting, Inc. in 1997, and eventually adopted the name of the company it had acquired to become CBS Corporation. In 2000, CBS came under the control of Viacom, which was formed as a spin-off of CBS in 1971. In late 2005, Viacom split itself into two separate companies, and re-established CBS Corporation – through the spin-off of its broadcast television, radio and select cable television and non-broadcasting assets – with the CBS television network at its core. CBS Corporation is controlled by Sumner Redstone through National Amusements, which also controls the current Viacom.
CBS continues to operate the CBS Radio network, which now mainly provides news and features content for its portfolio of owned-and-operated radio stations in large and mid-sized markets, and affiliated radio stations in various other markets. The television network has more than 240 owned-and-operated and affiliated television stations throughout the United States.