no
There are plenty of pictures of what some people think the latest Russian stealth fighter might look like and there several people who fly Russian stealth fighters. Many pictures, few facts. Have a look at Wikipedia to see what the latest pictures look like
The white trail is called a contrail which is short for condensation trail. The fumes that are emitted from the engines of planes contain a large amount of water vapours. When the plane is at a high altitude, the temperature can be low enough to freeze the water vapour into tiny crystals which we see as a white trail. The trail disappears when the water evaporates.
Here is the etymology (word origin) for the word stealth: ; stealth : c.1250, "theft, action or practice of stealing," from O.E. *stælþ, which is related to stelen (see steal), from P.Gmc. *stælitho (cf. O.N. stulþr). Sense of "secret action" developed c.1300, but the word also retained its etymological sense into 18c. Got a boost as an adj. from stealth fighter, stealth bomber, radar-evading U.S. military aircraft, activated 1983. Stealthy is attested from 1605. From the Related Link below.
mist steam are the condensed water vapour and we can see them but we cant see the water vapours
It is because water vapour is air so it can't be seen but when we breath out in the mirror,water vapour is found.
Yes. Stealth means you are invisible, you cannot be seen by anyone else but you can see them.
A vapor trail, also known as a contrail, is a visible line of condensed water vapor created by the exhaust of an aircraft flying at high altitudes. When the hot, humid air from the engines mixes with the colder atmosphere, it can form ice crystals, resulting in the trail we see behind the aircraft. These trails can vary in appearance and duration, depending on atmospheric conditions such as temperature and humidity.
water vapour
If you look carefully at a boiling kettle, water vapour is the white vapour you can see. Steam is actually the invisible short section between the spout of the kettle and the start of the water vapour.
your water vapour from within your body
Of course the United States do know how to use stealth technologies. The Americans been using stealth technologies for a few years without having people saying they good technologies but don't know how to use them. The B-2 bomber is the stealth technology, F-22 stealth raptor, stealth robots, drones and any other stealth technologies. The United States is now being called stupid but the United States is not stupid. They invented stealth technologies and they know how to operate these technologies. If you don't believe this than go see the United States creating more stealth technologies and see how the use stealth technologies. The F-22 and the SR-71 Blackbird are also stealth technologies but no one from any country but only the Americans had flown these two planes and know how to fly planes.
See my answer to~How does air conditiong work~ on this site.