A sign marks the vehicle of a census enumerator during Census training in Dummerston, Vt. , Tuesday, May 19, 2009. More than 60,000 Americans were hired in April by the Census Bureau to help update its master address file, a key component in the 2010 Census and the first major task in what will be the largest peacetime mobilization of civilian workers. Canvassers carry hand-held computers with global positioning system capabilities to record data.