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People screaming and running for their lives , right past us , chased by a 400 foot tall cloud of debris from the first tower 's collapse that enveloped us and left us in the dark wondering if the world was coming to an end . Cuban-American photographer Abelardo Morell is the featured artist in the biennial exhibition from our Cintas Fellows Collection . I should have also mentioned that these arrows represent the emitted radiation from the whole atmosphere on average . Traveling exhibition from the Smithsonian American Art Museum . He received his first musical instruction from his father , who was a good friend of the Haydn family , after which Albrechtsberger accepted him in his composition class at the age of 12 . Besser discusses the best practices for scanning and metadata creation , architectures for separating delivery from archiving functions , and modeling of digital object behaviors .