United Airlines Flight 585 was a scheduled passenger flight on March 3, 1991, from Denver to Colorado Springs, Colorado, carrying 20 passengers and 5 crew members on board. The plane experienced a rudder hardover while on final approach to runway 35 at Colorado Springs Municipal Airport, causing the plane to roll over and enter an uncontrolled dive. All 25 people on board the 737 were killed on impact.

Security-Widefield is a census-designated place (CDP) comprising the unincorporated communities of Security and Widefield located in and governed by El Paso County, Colorado, United States. The CDP is a part of the Colorado Springs, CO Metropolitan Statistical Area. The population of the Security-Widefield CDP was 38,639 at the United States Census 2020. El Paso County governs the unincorporated communities. Both the Colorado Springs post office and the Fountain post office serve the area.