Columbine High School

The Columbine High School massacre, commonly referred to as Columbine, was a school shooting and attempted bombing that occurred on April 20, 1999, at Columbine High School in Columbine, Colorado, United States. The perpetrators, twelfth-grade students Eric Harris and Dylan Klebold, murdered twelve students and one teacher. Ten of the twelve students killed were in the school library, where Harris and Klebold subsequently committed suicide. Twenty-one additional people were injured by gunshots, and gunfire was also exchanged with the police. Another three people were injured trying to escape. The Columbine massacre was the deadliest mass shooting at a K-12 school in U.S. history, until it was surpassed by the Sandy Hook Elementary School shooting in December 2012, and later the Robb Elementary School shooting in May 2022, and the deadliest mass shooting at a high school in U.S. history until the Parkland high school shooting in February 2018. Columbine still remains both the deadliest mass shooting and the deadliest school shooting to occur in the U.S. state of Colorado. Harris and Klebold, who planned for at least a year and hoped to have a large number of victims, intended for the attack to primarily be a bombing and only secondarily a shooting. But when several homemade bombs they planted in the school failed to detonate, the pair launched a shooting attack. Their motive remains inconclusive. The police were slow to enter the school and were heavily criticized for not intervening during the shooting. The incident resulted in the introduction of the immediate action rapid deployment (IARD) tactic, which is used in active-shooter situations, and an increased emphasis on school security with zero-tolerance policies. Debates and moral panic were sparked over American gun culture and gun control laws, high school cliques, subcultures (e.g. goths), outcasts, and school bullying, as well as teenage use of pharmaceutical antidepressants, the Internet, and violence in video games and movies. Many makeshift memorials were created after the massacre, including ones employing victims Rachel Scott's car and John Tomlin's truck. Fifteen crosses for the victims and the shooters were erected on top of a hill in Clement Park. The crosses for Harris and Klebold were later removed following controversy. Planning for a permanent memorial began in June 1999, and the resulting Columbine Memorial opened to the public in September 2007. The shooting has inspired dozens of copycat killings, dubbed the Columbine effect, including many deadlier shootings across the world. The word "Columbine" has become a byword for school shootings.

Columbine is census-designated place (CDP) in and governed by Jefferson and Arapahoe counties in Colorado, United States. The CDP is a part of the Denver metropolitan area. Located primarily in Jefferson County, Columbine lies immediately south of Denver. The population of the Columbine CDP was 25,229 at the 2020 census. The community lies in ZIP code 80123.

Southwest Plaza is an enclosed shopping mall in unincorporated Jefferson County, Colorado, immediately south of Denver. Littleton, Colorado is commonly indicated in the mall's postal address because its ZIP code is primarily associated with that city, which lies some two miles east. The mall has two levels with over 150 stores and a food court. The anchor stores are Dillard's, Dick's Sporting Goods, Round 1 Entertainment, and JCPenney. There are 2 additional anchor spaces, with one serving as a Macy's fulfillment center and a vacant anchor spot last occupied by Sears.

Marston Lake is a reservoir in Denver, Colorado. It is owned by Denver Water and was completed in 1902. The reservoir sends water to the Marston treatment plant, and from there the water is distributed to Denver residents. The reservoir receives water from the South Platte River. The river receives water from the Colorado Western Slope through a transmountain diversion via the Roberts Tunnel.

Bow Mar is a Statutory Town located in Arapahoe and Jefferson counties, Colorado, United States. The town population was 853 at the 2020 United States Census with 587 residing in Arapahoe County and 266 residing in Jefferson County. Bow Mar is part of the Front Range Urban Corridor. The current mayor of Bow Mar is Bryan Sperry.

The 1967 PGA Championship was the 49th PGA Championship, played July 20–24 at Columbine Country Club in Columbine Valley, Colorado, a suburb south of Denver. Don January won his only major title in an 18-hole playoff over Don Massengale (69-71). Both had overtaken the leaders with low scores in the fourth round on Sunday. Columbine was scheduled to host the championship in 1966, but flooding of the course by the South Platte River caused a postponement of a year. Firestone Country Club in Ohio, scheduled to host in 1967, swapped years with Columbine and was the site of the tournament in 1966.There was a possibility of a boycott of the championship by the top tournament players, due to grievances with the PGA of America. An understanding was achieved several weeks before and the top players entered.At the time, Columbine was the longest course in major championship history at 7,436 yards (6,799 m). The elevation of the course is over 5,300 feet (1,620 m) above sea level, additionally dry and fast conditions shortened its effective length. Tommy Aaron carded a course record 65 in the second round to take a four-stroke lead, but a 76 on Saturday dropped him two back and he fell out of contention on Sunday with a 78. The 54-hole leader was Dan Sikes, the chairman of the tournament players committee, who shot a final round 73 and finished a stroke out of the playoff, in a tie for third with Jack Nicklaus.This was the second and final 18-hole Monday playoff at the PGA Championship, formerly a match play event through 1957. The next playoff was ten years later in 1977 and the format was changed to sudden-death, immediately following the fourth round. It was later changed to a three-hole aggregate format, first used in 2000. The Open Championship was played the previous week near Liverpool, England, one of five times in the 1960s that these two majors were played in consecutive weeks in July. The PGA Championship moved permanently to August in 1969, where it remained through 2018 (except 1971, when it was played in late February). In 2019, the tournament moved to the weekend before Memorial Day.

The Town of Columbine Valley is a Statutory Town located in western Arapahoe County, Colorado, United States. The town population was 1,502 at the 2020 United States Census, a +19.59% increase since the 2010 United States Census. Columbine Valley is a part of the Denver-Aurora-Lakewood, CO Metropolitan Statistical Area and the Front Range Urban Corridor.

Colorado Academy is an independent nonsectarian, co-educational, college preparatory day school for students from Pre-Kindergarten through Twelfth Grade. The school's 94-acre (380,000 m2) campus is located in Lakewood, Colorado, and serves approximately 1000 students. The program is based on academics, arts and athletics. CA follows a trimester calendar, with grades issued at the conclusion of each term. Classes in all divisions follow a six-day rotating schedule.

Ken Caryl, commonly known as Ken Caryl Ranch, is an unincorporated community and a census-designated place (CDP) located in and governed by Jefferson County, Colorado, United States. The CDP is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area. The population of the Ken Caryl CDP was 33,811 at the United States Census 2020. The Ken Caryl Ranch Metropolitan District and the Ken Caryl Ranch Water District provide services. The Littleton post office (Zip code 80127) serves the area.

Englewood Federal Detention Center is a federal detention center that is part of a complex of federal prisons in Englewood, Colorado. The complex also includes Englewood FCI and the Englewood Federal Prison Camp. The FDC consists of two units, A and B, each of which has a capacity of about 100 inmates. Inmates are kept physically separated from those in the other unit and are not allowed to communicate with them. This facility has a psychiatric staff that conducts mental health evaluations of defendants who are temporarily transferred in from all over the country pursuant to United States federal laws governing offenders with mental diseases or defects. Nathan Johnson was housed in this facility pending trial for his role in the 2008 Barack Obama assassination scare in Denver.

Bridge is a sculpture by Stephen Shachtman, installed in Denver, Colorado, U.S.

The Federal Correctional Institution, Englewood (FCI Englewood) is a low-security United States federal prison for male inmates in Colorado. It is operated by the Federal Bureau of Prisons (BOP), a division of the United States Department of Justice. The facility also has an administrative detention center and an adjacent satellite prison camp for minimum-security offenders. FCI Englewood is located in unincorporated Jefferson County. FCI Englewood is located off of U.S. Route 285 and Kipling Street, 10 miles (16 km) southwest of Downtown Denver. The facility is named after the city of Englewood, Colorado, and has a Littleton, Colorado, mailing address, but is not in either city.