On this day — May 23

killing 14 people.

following the Maute's attack in Marawi.

conducted by the Islamic State of Iraq and Syria, kill at least 45 potential army recruits in Aden, Yemen.

coastline cities in Syria. One hundred eighty-four people are killed and at least 200 people injured.

Oklahoma, and northern Mexico.

including the perpetrator, are killed and another 14 injured in a killing spree near the campus of University of California, Santa Barbara.

Washington.

his wife and three body guards are killed by the Corleonesi clan with a half-ton bomb near Capaci, Sicily. His friend and colleague Paolo Borsellino will be assassinated less than two months later, making 1992 a turning point in the history of Italian Mafia prosecutions.