Across
- 2. What kind of phone cables were laid in 1956?
- 3. Scientist who introduced the polio vaccine in 1955.
- 4. How many major broadcasting networks where operationg during the mid-50s?
- 7. In 1952. a record number of 21,269 cases were reported of the illness caused by poliovirus.
- 10. In the early 50s, one of the world's longest underwater vehicular tunnels, opened, connecting Brooklyn & Manhattan in NYC. What is it called?
- 11. The upper & lower peninsulas of mishigan are connected by the world's longest suspension bridge. What is it called?
Down
- 1. The system that would total 41,000 miles of the roadways, linking one end of the country to the other.
- 5. Perfected a polio vaccine that could be administrated by mouth.
- 6. What month was the ribbon-cutting ceremony along the first portion of the interstate high-way on the 4th 1958?
- 8. What pace were the improvements in television technology?
- 9. In 1951, what transcontinental dialing services were first begun?