Answer:
The "grave danger" that the author is talking about is the danger of atomic weaponry
Explanation:
"Preliminary Statement of the Association of Manhattan District Scientists" was a 100-page report written after the atomic bombings in Hiroshima and Nagasaki.
The "grave danger" that the scientist is talking about in the article is the dangers of atomic weaponry. The article talks about the consequences that wrong decisions of leaders may have on its nations.
It would be the marvelous Roman Empire
No Gore did not win a mandate in 2000. He had only 48% of the popular vote which is not considered as a victory. He also lost many critical states which meant that he was not qualified to be president.
Clinton failed to have a majority vote in 1992. However, he did win a plurality of the states and was suited to be president per the Electoral College.
Hope this helps you :P
Built a fantastic city in the Andes where stone masons fitted gigantic blocks of stone without help
created a system of picture writing carved in stone
