What can the quote "If you don't say anything, you won't be called on to repeat it" by Calvin Coolidge mean?

Which best represents the view of the southern delegates at the constitutional convention

What event started the space race and made americans feel their security was threatened a.) alan shepard's suborbital flight. b.) the launch of sputnik c.) the launch of explorer d.) the cuban missle crisis

By july of 1950 north korean forces had pushed south korean forces as far south as