Patriot Day (9/11) Remembrance

Army Gen. Martin E. Dempsey, 18th chairman of the Joint Chiefs of Staff, joined Secretary of Defense Chuck Hagel and President Barack Obama in hosting the Pentagon Observance Ceremony, Sept. 11, 2013. The event was invitation-only for survivors and family members of those who lost their lives after the 9/11 event at the Pentagon 12 years ago. (DOD photo by Army Staff Sgt. Sean K. Harp)

Below are four slideshows involving various remembrance ceremonies for the victims of September 11, 2001 with the first one including more images of President Obama, military leaders, troops, families, and Pentagon civilians at the Pentagon Observance Ceremony.