2013day.year
A gunman kills twelve people at the Washington Navy Yard in Washington, D.C.
A gunman opened fire at the Washington Navy Yard on September 16, 2013, killing twelve people in one of the deadliest attacks on a U.S. military facility.
The shooting began in Building 197, a headquarters facility at the Navy Yard in Southwest Washington, D.C.
Perpetrator Aaron Alexis used a shotgun and semiautomatic pistol to move through the complex.
Twelve people lost their lives and several others were wounded before law enforcement neutralized the attacker.
The incident shook the military community and prompted a review of base security measures.
Inquiries examined gaps in mental health screening and access controls for base personnel.
The shooting underscored vulnerabilities at secured sites and led to policy changes across military installations.
2013
kills twelve people