Memorials, remembrances, and moments of silence on the twelfth anniversary of September 11, 2001.

Across the nation on September 11, 2013, memorials, remembrances, and moments of silence paid tribute to those who lost their lives on 9/11. The ceremonies at the World Trade Center, the Pentagon, and in Shanksville, Pa., were especially poignant, attended by those mourning friends, family, and loved ones. Here’s a look.