Secret project to develop the atomic bomb

Was the first african american to be appointed to the u.s. supreme court.

Why is it important that dr. luther king jr. use non-violent protest to create social change?

1. america's first national road morse 2. joined lake erie with the hudson river cooper 3. steam-driven locomotive erie canal 4. allowed businesspeople to keep in touch with trends cumberland 5. telegraph code fulton 6. clermont telegraph