That would be California
Silver State Helicopters ended in 2008.
Silver State Helicopters was created in 1999.
The military helicopter, also known as the Huey, are used for command and control, transportation, and also assault gunships. These helicopters are the most famous military helicopters.
Heinkel made the first for Nazi Germany, but now Boeing and Sikorsky are well-known companies for building helicopters
Bell Helicopter is an American company headquartered in Hurst, in the state of Texas, near Fort Worth. It manufactures helicopters and sells them worldwide.
The primary new helicopters known to most people are the "Blackhawk" and the "Apache" helicopters, as well as Chinooks and Sea Knights.
They fly helicopters.
They're powered either by a gas turbine engine (known as a turboshaft), or some helicopters (such as the Robinson helicopters) still use internal combustion engines.
Helicopters are about 200 feet
A group of helicopters.
Helicopters are machines, they can not grow.
what are the grey helicopters for