What was a concern that nasa had with the space race?

What is one reason the united states had a two party system

What triumphs did the late 19th century witness in the realms of industrial growth, urbanization, and technological innovation? what challenges did these developments pose for urban dwellers, workers, and recent immigrants? how did city officials and everyday citizens respond to these challenges?

This chart shows american troop strength during what conflict? a) gulf war b) korean war c) vietnam war d) world war ii