On this day: September 21

POSTED: 6:09 PM Sep 20 2012   UPDATED: 2:00 AM Sep 21 2015

"The Hobbit" is published for the first time, Jimmy Hendrix becomes Jimi, Sandra Day O'Connor is confirmed as the first female Supreme Court justice, and a track superstar dies, all on this day.

OTD September 21 - Westgate mall shooting
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Kenyan Presidential Press Service via Getty Images

2013: Islamic militants attack the Westgate shopping mall in Nairobi, Kenya, killing at least 67 people in an extended attack, using firearms and hand grenades. The terrorists held many customers hostage and it took four days to end the attack, by which time three floors of the mall had collapsed because of it. All four gunmen were also killed in the incident. The Islamist group al-Shabaab claimed responsibility for the incident, which it characterized as retribution for the Kenyan military's deployment in Somalia.