A propane tank explosion at the Indiana State Fair Coliseum (now the Indiana Farmers Coliseum) in Indianapolis kills 74 people and injures another 400 during an ice skating show.

The Indiana Farmers Coliseum (originally Indiana State Fairgrounds Coliseum and formerly Pepsi Coliseum and Fairgrounds Coliseum) is a 6,500-seat indoor multi-use arena, located on the Indiana State Fairgrounds in Indianapolis. The Indiana Farmers Coliseum is home to both the Indy Fuel of the ECHL and the IUPUI Jaguars of the NCAA.

Originally opened in 1939 as part of President Franklin D. Roosevelt's Works Progress Administration (part of the New Deal), the Coliseum has hosted numerous historical events, including the only performances ever held in Indiana by The Beatles, in 1964.After Market Square Arena opened in 1974, the coliseum continued on as an alternate venue to the larger arena for events requiring less seating or overall space. This continues today after the Gainbridge Fieldhouse opened in 1999, and the subsequent demolition of Market Square Arena in 2001.

On October 26, 2012, the Coliseum held a "Lights Out" ceremony and closed for renovations. On April 24, 2014, after a 17-month, $53 million renovation, the Coliseum re-opened.In December 2014, the Indiana Farmers Mutual Insurance Company entered into a ten-year agreement with the Indiana State Fair Commission to re-christen the arena as the Indiana Farmers Coliseum.

Propane () is a three-carbon alkane with the molecular formula C3H8. It is a gas at standard temperature and pressure, but compressible to a transportable liquid. A by-product of natural gas processing and petroleum refining, it is commonly used as a fuel in domestic and industrial applications and in low-emissions public transportation. Discovered in 1857 by the French chemist Marcellin Berthelot, it became commercially available in the US by 1911. Propane is one of a group of liquefied petroleum gases (LP gases). The others include butane, propylene, butadiene, butylene, isobutylene, and mixtures thereof. Propane has a lower energy density but burns more cleanly than gasoline and coal.Propane gas has become a popular choice for barbecues and portable stoves because its low boiling point makes it vaporize as soon as it is released from its pressurized container. Propane powers buses, forklifts, taxis, outboard boat motors, and ice resurfacing machines and is used for heat and cooking in recreational vehicles and campers.