Which bomber served as Strategic Air Command's front-line bomber in the 1950s?

The B-36 Peacemaker served as Strategic Air Command's front-line bomber in the 1950s, making it the correct choice. This aircraft was distinctive due to its design, incorporating six propellers as well as jet engines, which allowed it to achieve a substantial range and carry a heavy payload of nuclear weapons during the early Cold War. Its ability to fly long distances without refueling was crucial for the United States' policy of deterrence in the nuclear age.

During this period, the B-36 played a vital role in aerial strategic bombing doctrine and was intended to reach targets deep within enemy territory. Its large size and advanced capabilities compared to contemporary bombers made it a symbol of strategic power. The integration of advanced technologies for that era allowed the B-36 to perform well as a strategic bomber, reinforcing the U.S. military's focus on long-range strike capabilities.

In contrast, other bombers such as the B-24 Liberator, B-17 Flying Fortress, and B-29 Superfortress, while historically significant, were primarily used during World War II and had become less relevant to the Cold War strategic environment by the 1950s. The B-36 represented a shift in military aviation that aligned with the demands