ADD MORE LOCATIONS FILE - An envelope containing a 2020 census letter mailed to a U.S. resident is seen, April 5, 2020, in Detroit. The U.S. Census Bureau on Monday, July 22, 2024, picked six locations for full-scale dress rehearsals to practice for the next U.S. head count in 2030, the largest peacetime mobilization in the U.S. which helps determine political power and the distribution of federal funds. (AP Photo/Paul Sancya, File)