To be in America now is to witness two jarring realities at once: the quickening pace of the country’s return to normalcy and the worsening march of COVID-19 beyond its borders. U.S. cities are loosening restrictions, travel is picking back up, and Americans are preparing for a bacchanalian summer. At the same time, a surge of infections in countries including Brazil and India is producing death and suffering on a tremendous scale, a reminder that controlling the virus is ultimately a global challenge.