During the memorial ceremony he unveiled a granite slab monument to Jackson, which Clay hopes will become part of the museum.

VOA: standard.2009.07.11

In Washington, the Holocaust Memorial Museum has debated in the past, the issue of selling merchandise.

BBC: Touring history��s dark side

Today, the Slurry Wall is one of the most haunting features of the World Trade Center Memorial Museum.

FORBES: The Bathtub. Lower Manhattan's Wall Against Water.

Joe Daniels, CEO of the National September 11 Memorial and Museum, sent out an email offering comfort to Bostonians.

NPR: In NYC, Strains Of Solidarity With Rival Boston