Base of two exterior tridents that were part of the facade of the towers. (Photo: Jin Lee. Courtesy of the National 9/11 Memorial & Museum) Two 70-foot-tall steel trident-shaped columns ...

At the 9/11 Memorial Museum in New York, active-duty military, retired military and 9/11 family members are free. Visit the 9/11 Memorial Museum website for details. Military.com Disclaimer ...

The National September 11 Memorial & Museum serves ... daily from 8 a.m. until 8 p.m.; the museum is open Wednesday through Monday and select Tuesdays from 9 a.m. to 7 p.m. Last entry to the ...