Americans are marking 24 years since the Sept. 11, 2001, attacks with solemn ceremonies, volunteer work and other tributes honoring the victims.
Some 1,106 victims, or 40% of those who died, remain unidentified.
COME FROM AWAY: On 9/11, the world stopped. On 9/12, powerful stories moved us. Broadway's Come From Away tells the true story of what happened after the Twin Towers fell.
DAY OF REMEMBRANCE: A special event commemorating 9/11 was held in San Francisco. For the first time the city joined New York, Los Angeles and Phoenix in a unique program to turn a day of tragedy into something better.
Close to ten bomb sniffing K-9's are patrolling BART stations around the Bay Area following an attempted terrorist attack in NYC.
Officer Jack Collins arrested 27-year-old Ullah Akayed at gunpoint with the assistance of three other PAPD officers: Sean Gallagher, Anthony Manfredini and Drew Preston.