The B2 bomber is the only stealth strategic bomber in the world. Although the B2 bomber has first flown 30 years ago, no country has yet been able to develop a stealth bomber with comparable performance to the B2 bomber. The B2 bomber is a product of the late Cold War. In the 1980s, the Soviet air defense system became more and more comprehensive, and traditional strategic bombers were easily detected by radar. In order to increase its strategic deterrence against the Soviet Union, the U.S. military wanted to develop a stealth strategic bomber that could escape Soviet radar detection and launch a surprise attack on the Soviet Union.

In this context, the U.S. military issued tenders to several domestic military industry companies in the United States. The U.S. military industry giants Lockheed and Northrop both proposed their own plans. After comparative analysis, The U.S. military ultimately adopted the "Advanced Diamond" solution proposed by Northrop. From the time Northrop received the order to the B2 bomber officially entering service, it took *** 16 years. When the B2 bomber was put into service, the United States' rival, the former Soviet Union, no longer existed, and the mass production of B2 bombers was of little significance.

The cost of building a B2 bomber is very high. The cost of a B2 bomber is as high as 2.4 billion US dollars, which is equivalent to four years of military expenditure in the Philippines. The United States initially planned to order 165 B2 bombers, but after discovering that the cost of the B2 bombers was too high, the United States only ordered 21 B2 bombers. Although there are only 21 B2 bombers in service, the B2 bomber is still the most deterrent strategic bomber in the world.

The most powerful thing about the B2 bomber is its super endurance and stealth capabilities. The B2 bomber can sail 18,000 kilometers without aerial refueling. It can also maintain endurance without aerial refueling. 12,000 kilometers. The shape of the B2 bomber is full of technology, just like the aircraft driven by aliens in science fiction movies. The shape of the B2 bomber is mainly designed to improve stealth. Although the wingspan of the B2 bomber exceeds 52 meters and the length exceeds 21 meters, the reflection frequency displayed by the B2 bomber on the radar is only as large as a bowling ball.

The performance of the American F117 fighter-bomber on the battlefield is obvious to all. As a stealth strategic bomber with stronger stealth performance and larger bomb load, the B2 bomber has a devastating impact on the battlefield. Its capabilities are far superior to those of the F117 fighter-bomber. Since the B2 bomber was put into service, no B2 bomber has been shot down on the battlefield, and no country has developed a bomber with performance that surpasses the B2 bomber. Due to the high cost and high technical difficulty of the B2 bomber, it will be difficult to surpass the B2 bomber's leading position for a long time to come.