WATCH: 7th and final moment of silence held to honor those lost to 9/11 health effects

The 9/11 Memorial & Museum added a seventh moment of silence at this year’s ceremony to honor those who have died of illnesses related to their time at or near the World Trade Center site.

​The 9/11 Memorial & Museum added a seventh moment of silence at this year’s ceremony to honor those who have died of illnesses related to their time at or near the World Trade Center site.  US The 9/11 Memorial & Museum added a seventh moment of silence at this year’s ceremony to honor those who have died of illnesses related to their time at or near the World Trade Center site.