12. "In every dark hour of our national life a leadership of frankness and vigor has met with that understanding and support of the people 10 themselves which is essential to victory. I am convinced that you will again give that support to leadership in these critical days." - Franklin D. Roosevelt What is Roosevelt referring to during this time when referencing "Dark Hour"?

I'm just guessing

Explanation:

that dark hours means that someone going through the problematic days

the tallest building in the western hemisphere and the sixth tallest building in the world

answer: this is because archeologists keep finding artefacts and ancient ruins dated more than 10000 to 15000 years, date around scientists said humans discovered language; which is at least mysterious as scientists always have said that is necessary to have a language to have architecture and some basic maths.

explanation: brainlest