The bright blue sky above the World Trade Center site in lower Manhattan on Thursday did little to improve the solemn mood felt by the hundreds of visitors marking the 24th anniversary of the 9/11 terror attacks .

In fact, it did quite the opposite. It reminded mourners of that horrific day two decades ago — and how a bright sunny September morning with so much promise ended in one of the darkest days in the city’s history.

“I can’t help but notice the weather today , it is very much like it was 24 years ago on 9/11,” NYPD Commissioner Jessica Tisch, a native New Yorker, told PIX11 Thursday. “There was a beautiful blue sky and it was warm out. That’s what I remember. That’s why this is quite meaningful to me.”

Families and friends of the 2,977 victims of the World Trade Center terro

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