1. On January 28, 1938, the temperature in McIntosh, South Dakota, dropped to a state-record low of -58 degrees Fahrenheit.
2. The Pine Ridge Indian Reservation, located in southwestern South Dakota, was established on January 28, 1889, by executive order of President Benjamin Harrison.
3. On January 28, 1915, the South Dakota legislature established the State School of Mines in Rapid City, which later became the South Dakota School of Mines and Technology.
4. In 2014, on January 28, a federal judge in South Dakota struck down the state's ban on same-sex marriage, making it legal in the state.
5. On January 28, 1986, the space shuttle Challenger exploded just 73 seconds into its flight, killing all seven crew members, including South Dakota native and payload specialist Dr. Ronald McNair.