"The Genius of America" — a 30-foot mural that's been hidden behind a curtain.

Because a figure in the lower right corner was deemed offensive.

But late last year, the department... decided to delicately pull back the curtain — for a single hour, once a month — to allow people to make up their own minds....

Not a single objection was raised, which... might offer proof that “over the last decade and a half our sensibilities... have evolved.”