The B - 45 was an important part of the United States 's nuclear deterrent for several years in the early 1950s .
The B - 45 was soon superseded by the Boeing B - 47 Stratojet .
The B - 45 was an important part of the United States 's nuclear deterrent for several years in the early 1950s , but was soon superseded by the Boeing B - 47 Stratojet .