July 1, 2020 / By Antonia Noori Farzan, Rick Noack, Lateshia Beachum, Hannah Knowles, Derek Hawkins, Siobhán O’Grady and Hamza Shaban The number of coronavirus infections in the United States swelled enormously last month as states tried to relax quarantine rules and reopen their economies. More than 800,000 new cases were reported in June — led by Florida, Arizona Texas and California — bringing the nation’s …