Which aircraft is known as the first operational stealth bomber?

The first operational stealth bomber is the Lockheed F-117 Nighthawk. This aircraft was developed in the 1970s and made its first flight in 1981, entering service in 1983. It is recognized for its unique design, which incorporates angular shapes and radar-absorbent materials, allowing it to evade detection by enemy radar systems. This groundbreaking technology represented a significant advancement in military aviation, enabling the F-117 to conduct precision strikes in heavily defended areas.

While the Northrop B-2 Spirit, mentioned in the options, is indeed a stealth bomber and has advanced capabilities, it was not the first operational stealth aircraft. The B-2 entered service later, in 1997. The other options, such as the Boeing B-52 Stratofortress and the McDonnell Douglas F-15 Eagle, are traditional aircraft that do not feature stealth technology in the same capacity as the F-117. The recognition of the F-117 as the first operational stealth bomber highlights its pivotal role in shaping future military aviation and combat tactics.