four choppers in the air 
planes flying in squadron
white jetstream coming from tails
airplanes have propeller engines
the wheels on airplanes 
tails on airplanes have fins
sky is clear and blue
airplanes are leaving jet streams
planes flying in formation
a group of planes
a group of planes flying
a group of planes flying in air
a group of planes flying near sky
a group of planes flying near clouds
a clear view of sky
Four planes in the sky. 
smoke in air 
third in line 
a blue sky 
propellars on choppers 
six small planes flying in formation in the sky