Comcast
Comcast also owns many local channels. Comcast also has a variety network known as Comcast Network, available exclusively to Comcast and Cablevision subscribers. The channel shows news, sports, and entertainment and places emphasis in Philadelphia and the Baltimore/Washington, D.C. areas, though the channel is also available in New York, Pittsburgh, and Richmond. In August 2004, Comcast started a channel called Comcast Entertainment Television, for Colorado Comcast subscribers, and focusing on life in Colorado. It also carries some National Hockey League and National Basketball Association games when Altitude Sports & Entertainment is carrying the NHL or NBA. In January 2006, CET became the primary channel for Colorado's Emergency Alert System in the Denver Metro Area. In 2006, Comcast helped found the channel SportsNet New York, acquiring a minority stake. The other partners in the project were New York Mets and Time Warner Cable.

Q: In what year did Comcast Entertainment take over operation of Colorado's Emergency Alert System?
2006