America has always been strong in the eyes of outsiders. It is only a short period of more than 200 years since they met, but they are at the forefront of the world in politics, economy and culture, especially after World War II, when they became the first in the world. So many people also think that the United States has no shortcomings. After all, no country has dared to take the initiative to recruit people from the United States.

But in fact, we need to know that a country and a person are the same. Even if they are strong, they can't be without shortcomings or defects. It's just that their shortcomings are not displayed in front of everyone. As long as they have a pair of discerning eyes, it is not difficult to find their shortcomings.

We all know that the military technology in the United States is very strong, and there are very powerful scientists in the United States. Scientists from all over the country will come to the United States because they can provide them with more advanced technology, more advanced equipment and so on. But in fact, even if the United States is so powerful, they still don't have some technology.

Like a canard plane. A canard plane is the front wing of a fighter. Its main function is to improve physiology and stall angle of attack by using the generated vortex, and it has a large lift-drag ratio. In fact, this kind of aircraft has appeared in large numbers as early as the 1970s. However, in Europe and China, there was a whirlwind of canard aircraft. However, the only country that does not adopt canard design is the United States. Of course, canard aircraft has the disadvantage of instability, which is a compromise to the lack of engine power. The power technology in the United States is so developed that it may be excusable not to use this technology, so they once deliberately said that the best installation position of the canard is someone else's plane.

In addition, there are slums in the United States now, but for many other countries, slums basically do not exist. Even if there are some poor places, they will not be as backward as slums. This is also a shortcoming of the United States. Although its appearance looks strong and its economy is developed, it is the only place that is criticized. At the same time, rare earth resources are also the shortcomings of the United States, and rare earth refining technology is also monopolized by China today.

In fact, for any country, it is impossible for them to have shortcomings, perhaps not in military technology, but also in other aspects. For example, why did the United States attack those remote or backward countries, mainly because it took a fancy to other people's oil or other resources. Therefore, the United States is not invulnerable, but its powerful appearance makes people feel scared.