How did Maria Stewart build an argument against slavery and in support of abolition?

How did David Walker build an argument against slavery and in support of abolition?

How did Angelina Grimke build an argument against slavery and in support of abolition?

After the success of the sputnik launch, the united states feared that they would never be able to launch their own satellite, the ussr had used technology developed by the united states, the soviets had superior nuclear capabilities, that any future us satellites would not be as successful.