Photo gallery: 9/11 museum ready to open in New York Photo gallery: 9/11 museum ready to open in New York Associated Press photo -- A pair of World Trade Center tridents, that once formed part of the exterior structural support of the east facade of the building, are displayed at the National Sept. 11 Memorial Museum 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. JENNIFER PELTZ| Associated Press Comments NEW YORK — At the 9/11 museum the story of the terrorist attacks is told on a scale as big as the twin towers’ columns and as intimate as victims’ last voicemails. The National September 11 Memorial Museum is set to be dedicated Thursday before opening to the general public May 21. By turns chilling and heartbreaking, the ground zero museum leads people on an unsettling journey through the terrorist attacks, with forays into their lead up and legacy.