Later crusades marched to Egypt to <span>support the Kingdom of Jerusalem by targeting the danger.</span>
If it is what i think it is, it should be sharks :)
Answer:
That Germany was researching nuclear weapons.
Explanation:
This letter was written by Leo Szilárd and signed by Albert Einstein, and sent to warn the President of US Franklin D. Rooselvelt in 1932, about Germany developing atomic bombs.