United States Air Force was the last military branch, formed on 18 September 1947.
I believe that the answer is Britain and Ireland.
The correct answer is letter C, the accident at Three-Mile Island. Such incident that occurred on March 28, 1979 change the way how USA constructed and operated power plants the following year. This accident was the most serious accident in USA's commercial nuclear power plants making them change policies and laws about building such massive structures again.
The paranoia and anxiety of the county and the newfound distrust in the government let to the growth.
The cuban missile crisis<span />