Probably the biggest loss of americans at home during world war i were blank

When war broke out in Europe in 1914 President Wilson declared that the United States would follow a strict policy of neutrality. This was a product of a longstanding idea at the heart of American foreign policy that the United States would not entangle itself with alliances with other nations.

https://www.rte.ie/centuryireland/index.php/articles/q-a-why-did-the-united-states-join-world-war-one

the space race was a battle to make advanced technology to get to the moon and to get a better understanding of space.