On Feb. 14, 2018, a former student opened fire with a semiautomatic rifle at Marjory Stoneman Douglas High School in Parkland, Florida, killing 17 people in the nation's deadliest school shooting since the Sandy Hook Elementary School attack in Newtown, Connecticut, more than five years earlier. (Nikolas Cruz pleaded guilty to murder in October 2021 and was later sentenced to life in prison without the possibility of parole.)

On Aug. 19, 2010, the last American combat brigade exited Iraq, seven years and five months after a U.S.-led invasion marked the beginning of the Iraq War.

On Feb. 14, 2018, a gunman identified as a former student opened fire with a semi-automatic rifle at Marjory Stoneman Douglas High School in Parkland, Florida, killing 17 people in the nation's deadliest school shooting since the Sandy Hook Elementary School attack in Newtown, Connecticut, more than five years earlier. (Nikolas Cruz pleaded guilty to murder in October 2021 and was sentenced in November 2022 to life in prison without the possibility of parole.)