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STATI UNITI D'AMERICA Istituzioni Federali Federal Institutions |
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| Camera dei Deputati | http://www.house.gov | House of Representatives |
| Link ai Congressi | http://www.congress.org | Links to Congress |
| Senato | http://www.senate.gov | U.S. Senate |
| Casa Bianca | http://www.whitehouse.org | The White House |
| C.I.A. | http://www.cia.gov | C.I.A. |
| Biblioteca del Congresso | http://www.loc.gov | Library of Congress |
| Nasa | http://www.nasa.gov | Nasa |
| Accademia Nazionale | http://www.nas.gov | National Academics |
| Centro per il Controllo e la Prevezione delle Patologie | http://www.cdc.gov | Center for Desease Control and Prevention |
| Servizio Postale Americano | http://www.usps.gov | U.S. Postal Service |