[RKDinOKC]

Of course they are made of some kind of different material that solves all those problems.
They can fly in air, space, and even under water.

There are 35000 of the Mach 19 vehicles in use, most were sent to Mars. 1500 were sent to be used on the Moon.

The cloaking devices only work if you are 1000 ft or farther away.
They take off and land from underground at bases that have at least 1000 ft perimeter.
They go straight up until they can travel without being seen.

The two whistle blowers that told about this stuff died on the same day.