Election Day, Pima County and Arizona, 2020 Voters put on masks outside the Avra Valley Fire District Station 191 before casting ballots, on Nov. 3, 2020. Josh Galemore / Arizona Daily Star ...

The Harshaw district in the Patagonia Mountains covers 40 square miles, but it produced 1.3 million tons of ore between the 1850s and early 1960s — including an abundance of zinc, lead, silver ...