It's not a sight you see every day. 

It included tribute videos, a flyover and a playing of "taps."

Two HH-60 Black Hawk helicopters crashed near Fort Campbell on Wednesday night.

A Black Hawk Helicopter based out of Fort Knox landed at the fair for a six hour stop.

Officials said autonomous helicopters can help Army pilots focus less on mechanics and more on the mission at hand.

The massive aircraft touched down in a field near the hospital, blowing up dirt, dust and debris.