“We don’t know how long this period of extreme difficulty will continue,” the museum’s director, Adam Weinberg, said in an email to staff.“We don’t know how long this period of extreme difficulty will continue,” the museum’s director, Adam Weinberg, said in an email to staff.Read MoreQuarantine (Life and Culture), Museums, Art, Layoffs and Job Reductions, Whitney Museum of American Art, Finances, New York City, Weinberg, Adam D