Photos: The National September 11 Memorial Museum officially opens

Issues

1 Surviving firefighter Dan Potter's fire helmet, which he used at Ground Zero on September 11. 
2 Two tridents from the original World Trade Center loom inside the National September 11 Memorial Museum. 
3 U.S. President Barack Obama speaks during the opening ceremony for the National September 11 Memorial Museum at ground zero May 15, 2014 in New York City. 
4 A quote from Virgil fills a wall of the museum prior to the dedication ceremony at the National September 11 Memorial Museum. 
5 Cards, patches and mementos of those killed at Ground Zero are are viewed during a preview of the National September 11 Memorial Museum. 
6 Dust, ash and debris from the collapsed Twin Towers are viewed on the clothes from the store Chelsea Jeans in an exhibit at viewed during a preview of the National September 11 Memorial Museum. 
7 A section of the "slurry wall," the surviving retaining wall of the original World Trade Center is displayed during the opening ceremony for the National September 11 Memorial Museum. 
8 A display at the National September 11 Memorial Museum at the World Trade Center site May 14, 2014 in New York. 
9 A photograph of one of the World Trade Center towers collapsing after the September 11, 2001 attack. 
10 A display showing the Al-Qaeda hijackers, is seen during a press preview of the National September 11 Memorial Museum. 
11 A man looks at a picture of the original World Trade Center towers in the windows of the National September 11 Memorial Museum. 
12 The National September 11 Memorial Museum stands beyond the north reflecting pool during the opening ceremony for the museum. 
13 A woman tries to look through the windows of the National September 11 Memorial Museum. 
14 A choir from the balcony performs at the start of the opening ceremony for the National September 11 Memorial Museum. 
15 Former New York City mayor Rudy Giuliani (2nd R) greets eleven members of FDNY and Port Authority who were trapped and survived during 9/11. 
16 Members of the general public watch a screen projection of President Barack Obama giving a speech during the dedication ceremony at the National September 11 Memorial Museum.