Have you ever seen an airplane refuel in the sky?

Image: muratart / shutterstock.com

I didn't know an airplane could be refueled mid-air until I saw this video and learned about the process. Sometimes during a rare emergency, a plane starts running dangerously low on fuel while in the air. Other times, planes need to stay up in the sky for a long time either in the military, or during a search and rescu…