Health care providers and first responders across Pima County are pleading with residents and visitors alike to stay home as their health care system "is near the breaking point." Over two dozen leaders from Pima County’s health department, hospitals and fire departments signed a strongly worded letter Friday encouraging everyone to stay home, wear masks and forego holiday gatherings to slow the spread of COVID-19. "Our emergency departments and hospitals are full, and they are facing shortages of staff and critical supplies. Hospital workers are exhausted and there is no end in sight, pre...