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Highlights problems with the World Trade Center evacuation.

This report describes how the aircraft impacts and subsequent fires led to the collapse of the towers after terrorists flew jet fuel laden commercial airliners into ...

Watch full episodes of your favorite PBS shows, explore music and the arts, find in-depth news analysis, and more. Home to Antiques Roadshow, Frontline, NOVA, PBS ...

Science news and science articles from New Scientist

Infoplease.com, a free, authoritative, and respected reference for Internet users, provides a comprehensive encyclopedia, almanac, atlas, dictionary, and thesaurus ...

Architecture around the world and across history - 1000 classics of world architecture in an online multimedia encyclopedia with photos, drawings, bibliographies ...

the world magazine of design and building, with news and features on architecture, construction, digital media, and building culture.

Mission of TMS is to promote the global science and engineering professions concerned with minerals, metals, and materials.