New York

Sept 11 Museum.JPEG-0a1ab.jpg

People try to look through the windows of the National September 11 Memorial Museum during the museum's dedication in New York on Thursday, May 15, 2014. (AP Photo/Justin Lane, Pool)

Sept 11 Museum.JPEG-09db0.jpg

People try to look through the windows of the National September 11 Memorial Museum during the museum's dedication in New York, on Thursday, May 15, 2014. (AP Photo/EPA, Justin Lane, Pool)

bb699ed505563c13540f6a706700e724.jpg

Fragments of the fuselage of Flight 11, that hit the World Trader Center, are displayed at the National Sept. 11 Memorial Museum, Wednesday, May 14, 2014, in New York. The museum is a monument to how the Sept. 11 terror attacks shaped history, from its heart-wrenching artifacts to the underground space that houses them amid the remnants of the fallen twin towers' foundations. It also reflects the complexity of crafting a public understanding of the terrorist attacks and reconceiving ground zero. (AP Photo)

75407ebf05573c13540f6a7067000847.jpg

The remains of Fire Dept. of New York Ladder Company 3's truck are displayed at the National Sept. 11 Memorial Museum, Wednesday, May 14, 2014, in New York. The museum is a monument to how the Sept. 11 terror attacks shaped history, from its heart-wrenching artifacts to the underground space that houses them amid the remnants of the fallen twin towers' foundations. It also reflects the complexity of crafting a public understanding of the terrorist attacks and reconceiving ground zero. (AP Photo)

9d3330c305913d13540f6a706700c161.jpg

Actor Robert Robert De Niro attends the the dedication ceremony in Foundation Hall, of the National September 11 Memorial Museum, in New York, Thursday, May 15, 2014. (AP Photo/Richard Drew, Pool)

37749e7505913d13540f6a70670065d9.jpg

Developer Larry Silverstein attends the dedication ceremony in Foundation Hall, of the National September 11 Memorial Museum, in New York, Thursday, May 15, 2014. (AP Photo/Richard Drew, Pool)

586e571405893d13540f6a706700b152.jpg

A New York City firefighter looks at the last column recovered at the World Trade Center site at the dedication ceremony for the National 9/11 Memorial Museum on Thursday, May 15, 2014 in New York. The museum memorializes the September 11 attacks on the World Trade Center in New York. (AP Photo/John Angelillo, Pool)

Sept 11 Museum.JPEG-0b152.jpg

A New York City firefighter looks at the last column recovered at the World Trade Center site at the dedication ceremony for the National 9/11 Memorial Museum on Thursday, May 15, 2014 in New York. The museum memorializes the September 11 attacks on the World Trade Center in New York. (AP Photo/John Angelillo, Pool)