How did Katherine g Johnson contribute to science?

What European nation explored the Southwest part of America Spain France England or Russia? Which countries support which sides in the Israeli-Palestinian conflict? Why is king tuts tomb famous? What country is older US or Germany? What was the contents of a World War 1 first aid kit? Where do you go to visit the birthplace of Pancho Villa? Why use a computer? Can you still get parts for your Benjamin Franklin model 132 22cal. pellet gun? What crops were cultivated in ancient Greece? Why did the Americans become angry with the french? What was the 1997 UN Convention? Why were mushrooms popular in the Middle Ages? Which was the greatest genocide the Holocaust or native Americans? Why was Octavian was given all of these titles EXCEPT? Where is the Cudahy Family Library in Cudahy located? Origin of the name Alton il? Why does Thomas Jefferson begin the Declaration of Independence with a list of basic human rights? What was the date and name of the battle that gave the US control of CA? Has London England ever won the world Cup in soccer? Who called a meeting of the Estates-General in 1789?