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In the absence of a single overarching authority or a master plan to integrate existing data , the ability to maximize water use decisions is significantly compromised . Moreover , nearly half of Americans ( 49 % ) think HIV / AIDS is a " more pressing problem for the nation today than it was a few years ago . Once one of the most popular Egyptian ports , Heracleion was surpassed in importance by Alexandria , yet scientists are unclear about how the city met its end at the bottom of the sea floor , with many believing an earthquake to be responsible . Millions of copies of the skin cell 's mRNA were reproduced , forming a blueprint that allowed the researchers to work backward and rebuild the DNA sequence of the coding region of the fibrillin gene . Users may read the full text of the report or a six-page summary at the Pew site .